When a person does a push up, first pushing off the floor and fully straightening their elbow and the returning to the ground so that their chest touches the floor, what motions does the scapula go through

i think it because equal matrices have equal dimensions, only square matrices can be symmetric. for all indices and . every square diagonal matrix is symmetric, since all off-diagonal elements are zero. in linear algebra, a real symmetric matrix represents a self-adjoint operator over a real inner product space.

.) the observation by semmelweis that more mothers died of childbed fever when their doctors also worked in the morgue