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Nathaniel Johnston's user avatar
Nathaniel Johnston's user avatar
Nathaniel Johnston
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I am an Associate Professor at Mount Allison University in Sackville, New Brunswick, Canada. I am interested in quantum entanglement, combinatorics, matrix analysis, and (just to mix it up) Conway's Game of Life.

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question
51
A strengthening of the Cauchy-Schwarz inequality
Jun 2, 2018
question
35
Orthogonal vectors with entries from $\{-1,0,1\}$
May 17, 2023
answer
32
Necessary conditions for the existence of solution of Sylvester equation AX=XB
Feb 29, 2020
answer
31
What is the intuition for the trace norm (nuclear norm)?
Aug 6, 2017
answer
31
Square root of doubly positive symmetric matrices
Oct 18, 2020
answer
28
Are infinite planar graphs still 4-colorable?
Dec 15, 2013
answer
22
Which theorems have Pythagoras' Theorem as a special case?
May 5, 2022
answer
19
When is 2 qualitatively different from 3?
Nov 9
answer
18
positive not completely positive maps
Jul 15, 2015
answer
17
Possible values of the determinant for matrices with elements $\{1, 0, -1\}$
Apr 17, 2022
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23
Does $\lfloor(4+\sqrt{11})^{n}\rfloor \pmod {100}$ repeat every $20$ cycles of $n$?