Under the operation AB ≡ AB+BA , they form a Jordan algebra.
Under the operation AB ≡ AB+BA , they form a Jordan algebra. They are closed under multiplication 2  only if the multiplicands commute. Quantum observables must be this type of operator because their eigenvalues are always real, and if their entries are real, these matrices are symmetric. For ten points, name these type of self- adjoint matrix equal to complex conjugate of its transpose.
Under the operation AB ≡ AB+BA , they form a Jordan algebra.
Hermite or Hermitian Matrix  1  INDIANA UNIVERSITY TOSSUPS, ROUND 6  5