Suppose $\phi$ is a bilinear form on the vector space $V$.
What does it mean (perhaps in matrix form) for $\phi|_X$ to be non-singular, where $X\leq V$?
This question is probably elementary, but I want to check that I have the right idea.
Thanks.
Suppose $\phi$ is a bilinear form on the vector space $V$.
What does it mean (perhaps in matrix form) for $\phi|_X$ to be non-singular, where $X\leq V$?
This question is probably elementary, but I want to check that I have the right idea.
Thanks.