Louis de Branges had a paper on his homepage claiming a solution for the Invariant Subspace Problem.
But I don't see that paper anymore, though he still has a "proof" of Riemann Hypothesis on his website.
Does anyone know whether he actually admitted his proof of the Invariant Subspace Problem was wrong? Or someone pointed that out?
His proposed proof of the RH has been on his website for many years now, and yet no one has pointed out an error.