fact The text currently says In May 1926 Schr dinger published a proof that Heisenberg s matrix mechanics and his own wave mechanics gave equivalent results mathematically they were the same theory Both men claimed to have the superior theory Somebody has put a fact tag on this claim It is true that Schr dinger published such a proof If one theory can be derived from another theory i e if they are mathematically the same theory then one can not be superior to the other About the only thing one of them might claim would be that his way for formulating the mathicatical relationships is easier to compute under certain conditions I would be in favor of deleting the claim It does not help the reader to understand quantum physics