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What is a proof, really?
(
profkeithdevlin.org
)
62 points
by
CarolineW
on Nov 24, 2014
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37 comments
What is algebra?
(
profkeithdevlin.org
)
135 points
by
ColinWright
on Aug 27, 2013
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85 comments
What is algebra?
(
profkeithdevlin.org
)
5 points
by
ColinWright
on Aug 11, 2012
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