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WittIndex -- returns the Witt index of a symmetric bilinear form



By Witt decomposition, any form decomposes uniquely as $\beta \cong k \mathbb{H} \oplus \beta_a$ where the form $\beta_a$ is anisotropic. The integer $k$ is called the Witt index of $\beta$. See for instance [L05, I.4.3].


See also

Ways to use WittIndex :

For the programmer

The object WittIndex is a method function.