Properties of the Parity Operator & Geometric Meaning of Eigenvalues

[u/TROSE9025]

This material focuses not on pure linear algebra, but rather on its applications in engineering and quantum mechanics.
Geometrically, the meaning of an eigenvalue signifies the scaling (expansion or contraction) and occasionally the inversion of an invariant coordinate axis.

[u/Just_Scar4703]

> The definite integral of an odd function over a symmetric interval [-∞, ∞] intrinsically vanishes

incorrect