Colin Tan

Member for 5 years, 9 months
Last seen more than a week ago

Singapore

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331

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2021
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co.combinatorics

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34

Alternatives to the law of the excluded middle

May 3, 2021

5

Modulo $x^2 + y^2 - 1$, is every homogeneous polynomial that is a square of a polynomial, necessarily of sum of squares of homogeneous polynomials?

Mar 30, 2023

5

Is the interior of the tensor product of two convex cones equal to the tensor product of their respective interiors?

Apr 13, 2023

4

Is the order arithmetic of the positive reals o-minimal?

Feb 27, 2019

3

Asymptotics of A000613

Sep 24

Answers

0

Is there a stiff graph that is not a core?

Sep 14

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co.combinatorics

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7

posts

lo.logic

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3

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graph-theory

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3

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polynomials

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2

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matroid-theory

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2

posts

Reputation

+20

Is there a ternary Cayley graph on 27 vertices that is a non-complete core?

+2

Number of binary matroids of rank $r$ on a ground set with $n$ elements

+30

Asymptotics of A000613

+10

Number of binary matroids of rank $r$ on a ground set with $n$ elements

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