# Prime number

There have been 1 document and 4 topic suggestions tagged with prime number.

## Documents

This is a reference document on Quadratic Reciprocity by Fengyang Wang. It covers a subset of the material of PMATH 340 or PMATH 440.

## Talk Suggestions

### Costas Arrays

Permutation matrices for which all $\frac{n(n-1)}{2}$ displacements between all pairs of 1s are distinct are known as Costas arrays, and these have important applications in sonar. The Welch construction of Costas arrays uses concepts from number theory, whereas the Lempel-Golomb construction uses concepts from field theory.

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### Distribution of Primes Modulo p

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