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user729424
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I teach math at the University of Southern Indiana.

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23
Can we deduce the characteristic polynomial for this matrix?
Jan 12, 2020
10
From the collection of all permutation matrices of size $10\times10$, one such matrix is randomly picked. What is the expected value of its trace?
Feb 1, 2020
9
A problem regarding the hands of a clock
Feb 7, 2020
7
Can $\mathbb{Q}(u)$ be of degree 2 over $\mathbb{Q} (u^3)$?
Feb 1, 2020
7
A group $G$ with $n$ elements has the property $(L)$ if for any divisor $d$ of $n$ there is at least a subgroup $H$ of $G$ with $d$ elements
Jan 31, 2020
7
Counting the number of particular subgroups of a finite abelian group
Jan 25, 2020
6
Probability of three points on a 4 dimensional cubes forming an equilateral triangle
Jan 10, 2020
6
(Normal) subgroups of different orders of a group of order $20.$
Jan 23, 2020
6
Five lemma diagram without the middle vertical map
Jan 24, 2020
6
How do you rewrite a determinant of a matrix into a polynomial by induction?
Jan 24, 2020
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Possible bug with the edit command while reviewing first posts
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13
Is the chain homotopy category, K(Ab), an Abelian category? By Ab, I mean the category of Abelian groups.
9
undergraduate logic textbook
7
In what ways was "Star Wars" influenced by "The Hidden Fortress"?