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Mathematics
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Jay's user avatar
Jay
  • Member for 14 years, 7 months
  • Last seen more than a month ago
  • Minneapolis, MN
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About

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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29
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
15
Is there any conjecture that has been proved to be solvable/provable but whose direct solution/proof is not yet known?
Aug 12, 2018
13
Is The *Mona Lisa* in the complement of the Mandelbrot set.
Aug 3, 2013
10
Complete lattices and sublattices – which requirement is more stringent?
May 16, 2011
9
Showing that a set X with a trivial topology is not metrizable
Apr 20, 2011
8
Why is 'abuse of notation' tolerated?
Dec 25, 2012
8
Is there a Non-prime Number that is Divisible only by Numbers Greater than its Square Root?
Jun 19, 2011
7
How to understand why $x^0 = 1$, where $x$ is any real number?
Nov 15, 2012
7
Is the box topology good for anything?
May 5, 2011
6
Show: $\mathbb{C}=\overline{\mathbb{C}\setminus\left\{0\right\}}$
Jul 17, 2013

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9
Aligning multiple lines of text in an align environment
5
Does convex continuous mapping have a unique fixed point?
5
Aligning a very long ordered pair