# Gauss's Lemma

## Disambiguation

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**Gauss's Lemma** may refer to:

- Gauss's Lemma (Number Theory): relating the number of least positive residues of a prime to its Legendre symbol;
- Gauss's Lemma (Polynomial Theory)
- Gauss's Lemma on Primitive Rational Polynomials: the product of two primitive polynomials is primitive.
- Gauss's Lemma on Primitive Polynomials over Ring: the same in a wider context.
- Gauss's Lemma on Irreducible Polynomials: concerning the reducibility of polynomials
- Gauss's Lemma on Unique Factorization Domains