A mathematical object is said to be symmetric if it is invariant ("looks the same") under a symmetry transformation.
A function, matrix, etc., is symmetric if it remains unchanged in sign when indices are reversed. For example, is symmetric since .
A mathematical object is said to be symmetric if it is invariant ("looks the same") under a symmetry transformation.
A function, matrix, etc., is symmetric if it remains unchanged in sign when indices are reversed. For example, is symmetric since .
Weisstein, Eric W. "Symmetric." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Symmetric.html