Mathematics
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Jay
  • Member for 12 years, 5 months
  • Last seen this week
  • Minneapolis, MN
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I am interested in closure systems. I think of them as generalizations of the convex hull operation rather than a generalization of closure in topology. See: http://www.ams.org/meetings/sectional/1058-52-28.pdf

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All Questions Answers
Score Newest
answer
28
How can I prove that one of $n$, $n+2$, and $n+4$ must be divisible by three, for any $n\in\mathbb{N}$
Oct 11, 2013
answer
14
Is there any conjecture that has been proved to be solvable/provable but whose direct solution/proof is not yet known?
Aug 12, 2018
question
13
Is The *Mona Lisa* in the complement of the Mandelbrot set.
Aug 3, 2013
answer
10
Complete lattices and sublattices – which requirement is more stringent?
May 16, 2011
answer
9
Showing that a set X with a trivial topology is not metrizable
Apr 20, 2011
answer
8
Why is 'abuse of notation' tolerated?
Dec 25, 2012
answer
7
Is there a Non-prime Number that is Divisible only by Numbers Greater than its Square Root?
Jun 19, 2011
answer
7
How to understand why $x^0 = 1$, where $x$ is any real number?
Nov 15, 2012
answer
7
Is the box topology good for anything?
May 5, 2011
answer
6
Which combination of Peano axioms shows that $0\neq 1?$
Sep 21, 2022
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discrepancies between skills and ambitions
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Aligning multiple lines of text in an align environment
5
Getting nervous refereeing a paper
5
Aligning a very long ordered pair
5
Does convex continuous mapping have a unique fixed point?

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