What evidence would have been needed to refute the theory of gravity before it was proven to be law? HELP

In 1915, Albert Einstein put forth a new alternative theory of gravity: General Relativity. The way to test it against Newton's theory was to wait for a total solar eclipse. 100 years ago, Einstein was proven right. I hope that this helps you. :)

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.