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2d
comment Tool for the partition problem with planar rectangles
Thanks Joseph. Hmm, I suspect the most efficient process will be to make scaled-down versions out of paper and shuffle them around to see if I can pack them onto a scaled version of the big sheet. :( Because I'm a slow coder...
2d
asked Tool for the partition problem with planar rectangles
Aug
5
comment Text book for sheaf theory
Have you tried typing "Sheaf theory" into a search at a book retailer?
Aug
4
awarded  Yearling
Aug
1
awarded  reference-request
Jun
11
comment Lie bracket is a connection?
This is the stable webpage: rybu.org/DGNotes If you click on the March 25th, 2015 edition of the notes, it's around page 74, near the start of Chapter 3. Basic properties of connections continue until around page 92.
Jun
9
awarded  Nice Answer
May
10
awarded  Nice Answer
Apr
27
comment Given an infinite number of monkeys and an infinite amount of time, would one of them write Hamlet?
@Zach466920: there's no reason to expect monkeys trapped in a room with typewriters would evolve towards something that would use typewriters for their original purpose. Presumably they would find better things to do with them in the short term.
Apr
24
comment Surgery to unlink $S^1$ and $S^2$ in $S^4$
What do you mean when you say two disjoint submanifolds of a given manifold are "unlinked"?
Apr
7
comment A question about the index of vector field
Yes, an argument like that works.
Apr
7
comment A question about the index of vector field
What tools are you working with? Homology/cohomology/poincare duality, or are you working with transversality? There are approaches to your question from both directions.
Apr
7
comment A question about the index of vector field
Oh now I see. Your map $v$ is of the form $v : \partial U \to S^k$ and it extends to a map $v : U \to S^k$ is that correct? I assume $k$ is the dimension of $\partial U$.
Apr
7
comment A question about the index of vector field
Your question is ill-formed. It looks like you want to ask about something related to the Poincare-Hopf index theorem, but for manifolds with boundary. But when you refer to the "index" you do not supply any real context. Which index are you talking about?
Apr
1
reviewed Close Cuts and cycles in graph, edges in common
Apr
1
reviewed Close Why didn't Bernoulli and Euler use an integral comparison to estimate the solution to the Basel problem?
Apr
1
reviewed Close Probability of exactly k out of n events occuring
Apr
1
reviewed Close Negative integers congruent modulo m
Apr
1
reviewed Close Laplace equation in polar coordinates
Apr
1
reviewed Leave Open Parametric representation of a plane cut of a sphere at y=5