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Thomas Hayden
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This is a pretty rad theoretical math for non-mathematicians course guide
Cantor's Paradise for everyone

I just wrapped up work on a 5 week unit on comparing infinite sets for a ``math for liberal arts class.''  This follows my "knot theory for everyone" share a month ago. This time, it is more like "bijections for everyone." It is a lot less visual...

I have taught this material to this audience several times, but all of this document is "new" in that I rewrote it all this term for a new class structure. It is likely that there are embarrassing bits here, but I don't embarrass that easily.

I will write another unit on some prob/stat stuff to finish the term, and next term I can just use them off the shelf to run the class from a course pack. (I will be glad to get the time back to work on other things.)

Anyway, maybe someone will find it interesting for either the math or the pedagogy. So, here it is.

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Hockey season is almost upon us!
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A sobering quote from Carl Sagan

+Dewayne Hendricks runs a very interesting mailing list that includes emails forwarded from various interesting people. The other day, he forwarded a piece from one of his readers, Steve Crandall. Crandall wrote:

"In searching for some kit for the storm yesterday in the basement I came across Sagan's The Demon-Haunted World from 1987.  I never got around to reading it, so I just started it this morning to see if it works 25 years later."

An interesting, but very dystopic, paragraph:

"I have a foreboding of an America in my children's or grandchildren's time--when the Unites States is a service and information economy; when nearly all the key manufacturing industries have slipped away to other countries; when awesome technological powers are in the hands of a very few, and no one representing the public interest can even grasp the issues; when the people have lost the ability to set their own agendas or knowledgeably question those in authority; when, clutching our crystals and nervously consulting our horoscopes, our critical faculties in decline, unable to distinguish between what feels good and what's true, we slide, almost without noticing, back into superstition and darkness."

(p.25)

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