homotopy theory, (∞,1)-category theory, homotopy type theory
flavors: stable, equivariant, rational, p-adic, proper, geometric, cohesive, directed…
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see also algebraic topology
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A square matrix $A$ is called symmetric if it is equal to its own transpose matrix: $A = A^T$.
Symmetric matrices correspond to symmetric bilinear forms. Accordingly a symmetric matrix is called a positive or negative (semi-)definite matrix if the corresponding bilinear form is such (see there).
See also
Wikipedia, Symmetric matrix
Wikipedia, Positive-definite matrix
Created on December 31, 2018 at 05:22:33. See the history of this page for a list of all contributions to it.