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[xmca] Pana Sfard being positively positive about negatives!!

Here andy et al. See what turned up in my mail box wrapped in a smiley face.

There is even a review of a book by the same lurker about to be reviewed in

Life's little distractions, or perhaps an antidote to swine flu.

What if everyone stayed home and figure out why minus times plus =a minus in
a way that
made their futre ability to think mathematically more useful to them and did
not emerge
until they had it worked out? The flu would have not place left to propogate


Attachment: negatives - Sfard.pdf
Description: Adobe PDF document

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