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1 answer
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$\mathbb R$ and $\mathbb F_2$ rank in boolean matrix product

By rank I imply rank over reals ($\mathbb R$). I consider two $n\times n$ matrices $A,B$ having entries in $0/1$. The product below follows usual matrix product rules except $xy$ is $AND(x,y)$ and $x+...
User2021's user avatar
4 votes
1 answer
173 views

Subspaces of vanishing permanent

Suppose that $p\ge 5$ is a prime, $n$ a positive integer divisible by $p-1$, and $L<\mathbb F_p^n$ a subspace of dimension $d=n/(p-1)$. Do there exist vectors $l_1,\dotsc,l_n\in L$ such that the ...
Seva's user avatar
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1 vote
0 answers
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Zero as a repeated permanental root for a matrix over a finite field

All, Suppose $A \in Mat(n, \mathbb{F}_{q})$ for $q$ prime, $q \geq 5$, and $n \geq 2^{q-2}$ . Let $\pi_A(x)$ be the permanental polynomial for $A$. That is, \begin{equation*} \pi_{A}(x)=per(xI-A). \...
Sloan's user avatar
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