Hasse invariant of an algebra
= Hasse invariant of an algebra
{wiki=Hasse_invariant_of_an_algebra}
The Hasse invariant is a fundamental concept in the theory of algebraic forms and is particularly important in the study of quadratic forms over fields, especially in relation to the classification of these forms under certain equivalences. Given a finite-dimensional algebra over a field, the Hasse invariant provides a way to distinguish between different algebraic structures.