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A Kindle for all Seasons

image About three weeks ago, I splurged and ordered myself a Kindle 2.  I had bounced back and forth between wanting one and not but finally convinced myself that it was time to add another gadget to my repertoire.  And let me say, I love it!!  To alleviate any guilt over spending that kind of cash on another gadget, I replaced my personal laptop with it and I haven’t regretted that decision for even a minute.

Here’s a short summary of what I’m using it for these days.

  1. Reading Books. 
    Duh! I know.  Who would’ve of thought that an ebook reader would work so well for reading books?  I’ve been impressed with just how easy it is on the eyes.  The font size is easily adjustable and there are times when I fill the page with tiny text and times when it is more comfortable on the eyes to have a large print. 

    The first book I read was “A Study In Scarlet” by Sir Arthur Conan Doyle, first of his Sherlock Holmes novels.  As a huge fan of House (the medical drama on Fox starring Hugh Laurie), I have been intrigued by the incredible similarities between the characters of House/Holmes and Wilson/Watson.  Plus, with the new Sherlock Holmes flick at the movies, I felt it was time to brush up. 

    The best thing about starting with these books is that they are all free!There are a huge number of public domain classics that you can put on your kindle for free and with the Whispernet service included in the Kindle, you don’t even have to plug it into the computer.

    For the record, I have actually purchased two books so far for the Kindle.  The first was “The Complete User’s Guide To the Amazing Amazon Kindle 2: Tips, Tricks, & Links To Unlock Cool Features & Save You Hundreds on Kindle Content (#1 Guide to the Kindle US & Global)” by  Stephen Windwalker.  The second was a Bible (which I’ll go into in more detail later).

  2. Lecture Notes. 
    I’ve begun using the Kindle for my lecture notes in all of my courses that I teach.  This was the deciding factor when wavering on whether to buy the Kindle or not.  I was fortunate enough to have a friendly neighbor lend me their Kindle so I could test out the PDF rendering.  Scanning my hand written and occasionally typed up lecture notes is a breeze with the copier at my office.  Once converted to pdf, I just move the files over via USB and the Kindle 2 natively renders the pdf.  As long as I’m careful to scan with the darkness turned all the way up, they are perfectly readable.  It’s extremely convenient to only have to bring my thin little gadget to class in lieu of the 1.5” binder.  Plus, it remembers where I left off.
  3. Daily Bible Reading
    Thanks to a free but awesome piece of software called Calibre, I have a daily bible reading downloaded from BibleGateway.com.  I’ve not missed a day since I bought the Kindle.  I’m well into Exodus and wrapping up Matthew.
  4. News
    Using the same software, I can also have a USA today news feed prepared daily for my Kindle.  You can subscribe to newspapers and magazines through the Kindle store at Amazon, but cheapskate that I am, I have found a nearly as good solution for free.  Calibre has recipes built-in for several news sources including NYT, WSJ, USA Today and many, many more.  I do have to manually plug in my Kindle each morning to move these “subscriptions” over but the minor inconvenience easily outweighs the cost of these subscriptions on Amazon, in my opinion.
  5. Bible
    At first, I did not plan on putting the Bible on the Kindle.  However, the fact that I saw a friend using one in church combined with the fact that you can highlight and insert notes into the Kindle for any book convinced me to give it a try. I did some reading of reviews and found that the NASB by the Lockman Foundation is probably the best choice.  They were smart enough to include the book name with each chapter heading so that you can quickly look up a passage by just typing in the book name and chapter into the built-in search tool on the Kindle.
  6. Samples
    Just about every book in the Kindle Store at Amazon has a sample that you can have sent directly to your Kindle.  You can ready a chapter or two and see if the book is really something you are interested in.  You can shop for these books right on the Kindle or through the Amazon website.  When you click to send a sample, it shows up on the device within a matter of seconds.
  7. Checking Email/Facebook/Twitter
    The Whispernet service which delivers the books to the device is actually a data network just like I use on my Blackberry, only it’s free!!  I can log into my gmail, facebook, twitter, etc. and check all my stuff out from anywhere I have access to the the mobile network.  I’m pretty sure AT&T provides the service so if my Blackberry works, so does the Kindle.  It’s not a great browser and it’s relatively slow, but it’s still everywhere accessible and occasionally that comes in handy.

I’m aware that Apple’s probably about to announce the next big thing with its “iTablet” and I’m sure it will make a big impact on the world of ebook readers. And yet, I can’t imagine an Apple device that’s going to appeal to me in any way. I can guarantee it will be out of my price range.  I can guarantee that once I had it in my hands, I would be wishing it could run my windows stuff natively and that I could figure out how to get it to do what I want.  I’m not saying that Apple does things worse (or better) than Microsoft, but that I know how to do what I need to do and I don’t have the patience or the mental fortitude to balance my life between the Windows world at the office and an Apple world at home. 

Of course, the Kindle is not a device that runs Windows stuff natively but its niche doesn’t require it to.  If the iTable/iSlate or whatever it is going to be called, comes out and is basically an enhanced color ebook reader with awesome battery life and is in the neighborhood of $250 – $300, I will be totally bummed and will probably admit to having made a mistake in buying the Kindle.  Fortunately, that scenario is extremely doubtful.

In the end, I’m going to be very happy with my gadgetry for a good long while (at least 3 months, I’m sure).

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How to lie with your graphs

Stumbled across an interesting little post about 5 ways that you can lie with your graphs.  Actually, a better lesson to take from the post is “5 ways other people lie with their graphs and now you can call them on it.”

The post was on Talking Squid, entitled “Five Easy Lies”: Two of the most common ones I’ve seen in talks are below:

  • Choose your cutoffs
    image 
  • “The trend shows no increase for the last [n] days/months/years.”

    Don’t mention the previous [20 n] data points.

  • Talk about the trend of the trend
    image
  • “Sure the graph is going up for now, but the rate of increase is going down.”

    If this fails, talk about the rate of increase of the rate of increase. Keep on differentiating until you find a curve that matches your needs. If all else fails, try logarithms.

Read the rest…

The last comment reminds me of Mar’s Law that stumbled upon a couple of days ago:

Everything is linear if plotted log-log with a fat magic marker.

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How do you measure two-thirds?

imageFrom an article by Mary Ann Bragg which appeared on CapeCodeOnline and was also printed in this month’s College Mathematics Journal:

TRURO — Voters narrowly approved one of four zoning amendments late Tuesday night at the annual town meeting. But town officials were still looking at the exact vote count on that article yesterday.

In a vote of 136 to 70, voters passed a new time limit on how quickly a cottage colony, cabin colony, motel or hotel can be converted to condominiums. The new limit requires that those properties be in operation for three years before being converted to condominiums.

The idea behind the zoning amendment is to slow the pace of condominium development in Truro and preserve more affordable accommodations for tourists, according to citizens proposing the warrant article.

Currently Truro does not allow condominiums complexes to be built outright in its zoning bylaws. Instead, property owners must build a cottage colony, cabins, motel or hotel first and then covert it to condominiums through a special permit.

The exact count of the vote — 136 to 70 —had town officials hitting their calculators yesterday. The zoning measure needed a two-thirds vote to pass. A calculation by town accountant Trudy Brazil indicated that 136 votes are two-thirds of 206 total votes, said Town Clerk Cynthia Slade.

But is it?  Is 136 a sufficient number of votes to be considered two-thirds of the total 206 votes?  Let’s check:

If you use the fact that \frac{2}{3} \approx 0.66 and then proceed to multiply 206 by 0.66 you get 135.96.  There were 136 votes in favor which is  more than 135.96 so that means it passes, right?  If you think so, then you’d be WRONG!!! 

The main problem is the rounding.  In fact, \frac{2}{3} = 0.666666\ldots or using repeated decimal notation, \frac{2}{3} = 0.\bar{6}.  When you round, you are actually creating an error that, in this case, makes a pretty significant difference.

Think of it another way, lets compare 136 / 206 to 2 / 3.  First, just do it by decimal approximation:

\frac{136}{206} \approx 0.660194174757 < 0.6666666667 \approx \frac{2}{3}

My calculator cannot exactly represent either of these fractions but its accurate to 12 decimal places and I can clearly see that 136/206 < 2/3 so the vote should not pass.

Do you remember another way you can compare fractions?  Find a common denominator and convert each fraction, then compare. 

\frac{136}{206} \cdot \frac{3}{3} = \frac{408}{618}

\frac{2}{3} \cdot \frac{206}{206} = \frac{412}{618}

So, here we see that, again,

\frac{136}{206} = \frac{408}{618} &lt; \frac{412}{618} = \frac{2}{3}

This second method of checking is even better than the first because there are no approximations involved.  We’ve confirmed, absolutely, that 136 votes out of a total of 206 does NOT constitute two-thirds.

Fortunately, a good citizen made an anonymous call in Truro, MA, to clear this up.  What perplexes me is that they decided they needed to let the State Attorney General’s office decide on the correct count. The mathematical explanation wasn’t good enough. Can you say quantitative illiteracy?

Read the entire story here.

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Interesting facts about Euler

image I’ve not studied much of the history of mathematics but occasionally I read from a few books I have on my shelf on the subject.  When my mind is bogged down and I am unmotivated on my current projects, I pick up, say, Makers of Mathematics, by Stuart Hollingdale.

Today, I flipped open to the chapter on Leonhard Euler (one of my mathematical heroes) and learned (or re-learned) a few interesting facts about the man.

  • Entered the University to study theology and Hebrew but his mathematical abilities attracted the attention of Johann Bernoulli who gave him a private lesson once a week.  He received his master’s at 17.
  • His father greatly desired him to pursue his theological ambition’s but was convinced by Bernoulli that his son was destined to be a great mathematician.  Leonhard Euler remained a devout Calvinist all his life.
  • At the age of 26, Euler took on the leading mathematical position at St. Petersburg Academy
  • He and his wife had 13 children, only 5 of whom survived to adulthood.
  • He lost sight in his right eye fairly early in his career, probably due to overwork.
  • He spent 25 years at Berlin Academy and then returned to St. Petersburg at the age of 59 about which time he lost sight in his other eye.  The blindness didn’t stop him.  In fact, he completed a comprehensive analysis on the theory of the Moon’s motion.  All the complicated analysis was done entirely in his head.
  • In 1771, his house burned down.  In 1776, his wife passed away.  He died in 1783 at the age of 76 still active to the end.
  • All told, he published more than 500 books and papers during his lifetime, while a further 400 appeared post-humously.  It has been computed that his publications during his working life averaged about 800 pages a year.

For the record, the correct pronunciation of Euler is “oiler” not “yuler”.  That’s a minor pet peeve of mine.  It ranks right up there with folks that write my name as Scoot instead of Scott.  ;)  

Learn more about Leonhard Euler.

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image This week I was given the privilege of leading our campus Environmental Stewardship Bible Study.  Currently the study is walking through various sections of the Bible in order to provide a scriptural foundation for concepts in environmental stewardship.  It was my good pleasure to lead a study on Psalms.  While the actual Bible Study was driven by some excellent discussion, much of the material in the study below I was unable to get to.  This outline has been posted in our Blackboard classroom for the Bible study but I also post it here for those folks that have been following my previous postings on creation care.

Here are the two primary sources for the study (in addition to the Psalms themselves)

How to Read the Bible for All It’s Worth (2nd Ed.), by Gordon D. Fee and Douglas Stuart (Zondervan, 1993)

Out of the Depths (3rd Ed.), by Bernhard W. Anderson with Steven Bishop (Westminster John Knox Press, 2000)

Study Outline – Download PDF

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image In several lengthy discussions that I’ve had with friends and colleagues over my new interest in environmental stewardship, inevitably we begin discussing the stereotypes of environmental activists.  Being raised in West Texas my whole life, I haven’t really encountered very many individuals that would be classified as environmental activists, but I’ve certainly heard my fair share of disparaging political epithets: hippy, environmentalist wacko, tree hugger, ecoterrorist, econazi, etc.

If you have a personal conviction to care for God’s creation and feel that abuse to the environment is tantamount to desecrating a temple of God then you may be offended by such terms.  I wouldn’t blame you.  But there is also the very real concern that environmental activism might be concomitant with the deification of nature.  Some of the people I talk to have reminded me that the much of the theology of popular environmentalism comes from humanism, paganism and pantheism

As a friend stated on the last blog entry,

It’s too bad that over the last 2-3 decades, environmentalism has been appropriated by a mainly leftist political crowd and propped up as a kind of secular religion. Environmentalism is for everybody, and conservatives have a lot to bring to the table on this issue. Christians too.

I believe it is possible to respect God’s creation in the same way that we respect other temples of God without deifying them and treating them as a god, outright.  We are called to sanctify the church, the altar of God, and even our own bodies.

image So, instead of beginning with the love of nature and its beauty as a motivation of environmental stewardship, I think the best place to begin is in Scripture.  After all, the love of the outdoors has not come naturally to the “indoorsman” city-boy that I am.  If I do end up an environmental activist (yikes, that still scares me) it will be as one who moved from environmental indifference to environmental concern as a result of my faith and not as one who started out concerned about the environment and added my faith to the reasons for that concern.

By the way, I am still deliberately avoiding any statement or position on the many hot-button environmental issues such as climate change, over-population, deforestation, etc.  My reasoning goes back to the fact that the starting place for creation care is the stewardship of God’s world out of respect and honor for Him. Concern for nature and the world God created seems to be one of our responsibilities as God’s children with or without a crisis on our hands.

Below are several passages that I’ve begun meditating upon that deal with humanity’s relationship to creation and creation’s relationship to God. Please note that relating any of these passages to environmentalism can only be done in an honest and accurate interpretation of Scripture.  The most basic of principles that I hold to when interpreting scripture is that a passage cannot be made to say something that was not intended by the original author.  It must fit into the context in which it is given as well as in its genre.  The application of Scripture to our lives must flow out of the original meaning to the original audience.

The following were collected and compiled by the Evangelical Environmental Network and Creation Care Magazine.  You can download the original document from the Evangelical Environmental Network. These will serve as a devotional guide for the next few entries on environmental stewardship.

Jesus Christ’s Relationship to All of Creation: Creator, Sustainer, Reconciler, Consummator, true Imago Dei, Heir of all things, Lord

Creation Declares the Glory of God

The Old Testament Proclaims God as Creator

The Earth is the Lord’s

Christian Love and Justice

God Provide for and Desire’s Sufficiency and Contentment for the Rest of Creation

The Interrelationship Between Humanity and the Rest of Creation

The Rest of Creation Harmed by Humanity’s Sin

God’s Future Kingdom: a New Creation

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During Calculus last week, we covered slope fields and Euler’s method of first order initial-value problems of the form

 \begin{array}{rcl} \displaystyle \frac{dy}{dx} & = & f(x,y) \\[2ex] y(x_0) & = & y_0. \end{array}

During class we demonstrated the use of slope field to perform a basic qualitative analysis. We utilized a couple of different online applets as well as Maple 13.

Visualizing Slope Fields and solutions
Another similar page, with zoom

Direction Fields – A Maple 13 Worksheet

Below is a short demonstration of how we set up a simple application of Euler’s Method in Excel 2007. Consider the simple initial value problem:

 \begin{array}{rcl} \displaystyle \frac{dy}{dx} & = & x(6-y) \\[2ex] y(0) & = & 0. \end{array}

Recall that Euler’s Method is given by

 \begin{array}{rcl} x_i &=& x_{i-1}+h\\[2ex] y_i &=& y_{i-1} + hf(x_{i-1},y_{i-1}) \end{array}

Watch the demo:

image

This is just a quick and dirty implementation of Euler’s method in Excel but it gets the job done.

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image At Wayland, there has been an increased emphasis on the need to "go green".  I’ll admit to having inherited a very West Texas conservative viewpoint on the environment.  I’ll even go so far as to admit not giving it much thought at all and just taking for granted the natural resources that are available to me.

So, what is a West Texas conservative viewpoint on the environment?  Allow me to attempt to describe what I think it is and please don’t necessarily take the following as truth or even a fair representation of what I currently believe. And while this is by no means universal in this part the world, it’s certainly not uncommon.

If I can afford it, I can use it.  If it’s on my land, then I can do with it what I want.  The climate change issue is too controversial.  In spite of a vast scientific consensus among climatologists, the issue has become so politicized that I doubt the integrity of the scientists involved in the debate.  Is it warming, is it cooling, is it natural, is it man-made?  I don’t know because I haven’t paid close enough attention.  But if I allow myself to fall along party-lines, like I do on so many issues, then it may or may not be warming but it’s unlikely to be caused by man."

Of course, climate change isn’t the only issue.  There’s deforestation, there’s the massive extinction of animal life on the planet, there’s a significant decrease in the availability of fresh water, there’s pollution, and so much more.  If you listen to most environmentalists, we are doomed.  If you listen to the rest, we are at the very least at a crisis in human history.  The vast number of humans on this planet have reached the point that they are a geologic force changing the landscape, the ecosystem of the oceans, and the atmosphere.

Are these real issues?  Should I really be concerned?  I honestly haven’t decided yet.  But I have a renewed interest in finding out what I believe.

image At Wayland, we’ve had a couple of guests to our campus within the last two weeks, both of whom are founders of the organization called Care of Creation.  It is their goal to make Christians aware environmental issues and to promote their involvement in helping to become stewards of the environment.  Also, at Wayland we have begun an Environmental Stewardship Bible Study in which several faculty and staff members are participating.  In preparation for participating in the Bible Study, for attending the talks by our guests, and for completing a two-day workshop on environmental stewardship, I’ve begun doing a lot of reading in this area.

I have chosen to use my blog to document my journey down this road.  I may very well end up where I started but most certainly, by the end, I will have made some decisions and will have reached place where I can reasonably defend my positions.  Here is a brief survey of some of the questions that have arisen in my thought process about which I hope to reach a conclusion:

  • Does the Bible provide a foundation for environmental concern within the believer?
  • There is clearly a call to exercise dominion over creation and a reasonable case can be made that we should not abuse and destroy God’s creation.  Where is the line between cultivation and abuse?
  • Free markets are amazing for the development of new ideas to deal with societal and even environmental problems.  But they seem to be inevitably entangled with the problem of greed.  Free markets have polluted the environment and lead to the deposition of toxic chemicals into drinking water and caused major illnesses because of their disregard for people and their ultimate regard for the bottom line.  Is the free market the best and sole solution to potential environmental crises?
  • Is the alleged environmental crisis important enough to be a central ministry of the church or do we need "to keep the main thing, the main thing"?

image Here’s something I already know:  We are called to be stewards of many things as followers of Christ: stewards of our lives, stewards of our talents and gifts, stewards of our families, and stewards of our finances. God is creator and this world was deemed "good" by Him.  We should take care of this Earth, a gift that He gave us to live on.  The resources of this world are a gift and we are to be stewards of the Earth just as much as of our lives, family, finances and homes.

There is much, much more to come.

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I have a book on my shelf that I’ve probably had for close 15 years.  Every once in a while I pull it off the shelf and tell myself that I should read it and try it out.  The book is called “List  Your Self: Listmaking as the way to Self-Discovery”.  The subtitle says that it is “A provocative, Probing and Personal Expedition Into Your Mind, Heart, and Soul”

Seems to me that this is not only great fodder for a blog but also for a social network like facebook.  While many meme’s that go around annoy me to no end, there have been a few that have allowed me to know a little more about my online friends (mostly friends from days gone by).  That has to be one of my favorite things about Facebook and Twitter, getting to reconnect with old friends and keeping up with all my current ones.

So here it goes, List #1

List the Biggest Turning Points in Your Life

  • 1985: In fourth grade, I was recruited to participate in a UIL contest called Number Sense.  This definitely started me down a path toward becoming a mathematician and an educator.
  • 1985: Also the year that I accepted Jesus Christ as my personal Lord and Savior.  Life would be totally different without Him.
  • 1994: Summer I traveled to Bakersfield, CA, to work as a summer missionary.  Met Si Budagher and made a lot of good friends, a few of whom would eventually come to Wayland.
  • 1994: Senior year in high school when I decided to go to Wayland for college.  That was a major life decision considering I met my wife there and now plan on teaching there for as long as they’ll let me.
  • 1995: After a year as a Religion major, I missed math too much and decided to add mathematics as a major.
  • 1995: Also the year I met the most intriguing, hilarious, intelligent, witty, and beautiful woman that I have ever laid eyes on.  I took only a couple of months to learn that I would have to spend the rest of my life getting to know her.
  • 1998: Decided to go to Texas Tech to get my graduate degrees in Mathematics.  I decided very early that I wanted to teach undergraduate mathematics.
  • 1998: Marriage.  Almost nothing turns your life around more than this.
  • 2000: Children. NOTHING turns your life around more than this.  Emily came in August and being a father has become the most fulfilling and challenging job of my life.
  • 2000: Wayland hired me as a Mathematics Instructor. 
  • 2003: Along comes Timothy and we now have both a boy and a girl.  The family is seemingly complete.  It is the family that both Lori and I had always planned on.  We’re most likely done having kids at this point.
  • 2004: Along comes Zachary and God reminds us that his plans are better than ours.  Life is different and better than we ever imagined.  Our family is just not complete without the life of the party, Mr. Z.
  • 2005: Completed the Ph.D.  My formal schooling after 24 years is finally over.  Hard to believe.
  • 2007: With all my life goals seemingly met: family, Ph.D., teaching at WBU, I get restless and wonder if I shouldn’t try full-time research for a while.  So I do and after 6 months in a bioinformatics post-doc with Dr. Wilkins in Lubbock, I know that I’m cut out to be an educator.  Research will have to become my hobby.
  • 2008: After commuting for a term, we moved back to Plainview for financial reasons.  It’s tough at first but eventually, it becomes clear that this was the right decision.
  • 2009: We buy the house of our dreams.  Having saved up and having Lori working full-time (without sending any of the kids to day-care) we are in the perfect place to buy our dream house. 
  • 2009: I have been promoted to Associate Dean and begin in August in a new role as an administrator.  Still waiting to see what becomes of this turning point.

That’s a lot of turning points. Not all of them were major changes but most were definitely course corrections in life.

I’m curious, from both the readers of the blog and from my friends on facebook, what are some of your major turning points?

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The Real Story

Last week, a friend on Facebook pointed me to a story that seemed like it would be of interest to mathematician like myself but upon reading the story, there were a number of quirky details in the story and some important details missing.  It made me suspicious.

STOCKHOLM (AFP) – A 16-year-old Iraqi immigrant living in Sweden has cracked a maths puzzle that has stumped experts for more than 300 years, Swedish media reported on Thursday.

In just four months, Mohamed Altoumaimi has found a formula to explain and simplify the so-called Bernoulli numbers, a sequence of calculations named after the 17th century Swiss mathematician Jacob Bernoulli, the Dagens Nyheter daily said.

See the rest of the news story here.

Now, I’m no number theorist but I did take a course in Special Functions where the topic of Bernoulli numbers came up.  I was not aware of any 300 year old problem so I did some hunting and couldn’t find out what problem had been solved.  I also couldn’t find any mathematical news source citing the major development.

Thanks to Keith Devlin, we have a little more insight to the story.  In his MAA article this week, he wrote,

So I dug around on the Web for more details. There were a lot of news stories about the topic, but they all said more or less the same as the article I had already seen. Eventually, however, I found a Swedish news Website with an English-language story that was close to the source (Uppsala University).

"Swedish teen tackles centuries-old numbers challenge" was the headline. The story began, "A 16-year-old Iraqi immigrant in central Sweden has single-handedly figured out a formula with Bernoulli numbers that is normally reserved for much more seasoned mathematicians, earning him praise from professors at prestigious Uppsala University." Ah. Much more believable.

The reporter went on to explain that Altoumaimi, the young high school pupil, had developed some equations involving the Bernoulli numbers. When his school math teachers were unable to tell him whether what he had done was correct, the student contacted a professor at Uppsala University, who, after examining his work, declared that it was indeed correct. Not new, however. As the story continued,

"While it’s not the first time that someone has shown such Bernoulli number relationships, it’s highly unusual for a first year high school student to make his way through the complicated calculations, according to Uppsala University senior maths lecturer Lars-ke Lindahl."

I feel better knowing the truth behind the story.  Devlin was able to find the source I couldn’t find in my own digging.  Thanks, Keith.

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