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Apr
14
revised Are all mathematicians human calculators?
downvoted..
Apr
14
revised Are all mathematicians human calculators?
added 325 characters in body
Apr
14
revised Are all mathematicians human calculators?
added 571 characters in body
Apr
14
revised Are all mathematicians human calculators?
added 571 characters in body
Apr
13
comment groupoid of finite sets.
mathoverflow.net/questions/1114/…
Apr
11
answered Are all mathematicians human calculators?
Apr
7
revised DeRham Cohomology of the Circle and the Torus
spelling and formatting
Apr
7
suggested approved edit on DeRham Cohomology of the Circle and the Torus
Apr
4
accepted Differencing -vs- Differentiating
Apr
4
answered Differencing -vs- Differentiating
Apr
4
revised Differencing -vs- Differentiating
added 2 characters in body
Apr
3
comment exotic smooth structures
why is this double-downvoted? Is it because of what Qiaochu said or something more?
Mar
31
comment A challenge by R. P. Feynman: give counter-intuitive theorems that can be translated into everyday language
Odd spheres differ from even spheres.
Mar
31
comment Are male and female body topologically equivalent
@GrumpyParsnip Right. Actually I was just reading about some of these in www.math.upenn.edu/~ghrist/preprints/barcodes.pdf; it must have been looking up some related words that led me to this Q&A. Now I'm trying to think if the different ways of topologising bodies would lead to different answers for M/F.
Mar
31
comment Are male and female body topologically equivalent
All of this is true, but since the OP asked about the differences between male and female, we could look at only the scales on which they differ. (So, not that would exclude the nanoscale.)
Mar
12
comment Please, as possible, explain in layman's terms: What is a discontinuous space?
Start with things that are nearby each other. A discontinuous function breaks them apart. An example could be a hash function or a chaotic map. By contrast, continuous functions keep points that were nearby to start, near each other after the mapping. A "jump" or "gap" in a function plot is another example of splitting apart of things that used to be next to each other.
Mar
12
revised What is the intuition between 1-cocycles (group cohomology)?
g wasn't used
Mar
12
suggested approved edit on What is the intuition between 1-cocycles (group cohomology)?
Mar
11
comment What is the intuition between 1-cocycles (group cohomology)?
It's a great question. Not sure why you felt you needed to apologise so much for asking it.
Feb
24
comment Is it possible to alternate the law of mathematics?
(Doug Hofstadter discusses the feeling I refer to in my previous comment. He knew what a superscript was—an exponent—but what is this funny x₃? Not knowing that subscripts are merely indexes, he ran to his father with unbounded ideas (not just a logarithm) for the exotic things x₃ could mean. (And was disappointed when the magic was pulled away: the meaning of x₃ is pretty boring.))