**What do you think about the following MO question?**

By posting this question for feedback I am following David Roberts' very patient and kind advice.

*If you have already seen the question below please don't skip to read the italicized text below.*

"**What are some theorems by deceased or retired authors published in peer reviewed journals or otherwise reputable sources that are widely accepted to be true but that you happen to know are actually false?**

I am guessing we all encounter this from time to time, but there is no appropriate place to share them. Slowly but surely the mathematical literature is becoming a minefield if we all keep this information to ourselves. I will start with sharing an example. It concerns homotopy invariance of the Leray-Schauder fixed point index for compact and compactly fixed maps which I explained in detail here.

Thanks a lot for sharing your knowledge!

Note 1: the above question is different from this question which concerns results that are currently widely accepted to be false.

Note 2: if the author is not deceased or retired then this question has some suggestions of how one could handle it."

*Please allow me a few words to explain why this is important to me. Firstly, it may be relevant to know that I am autistic and I have great difficulty understanding other people's feelings. Truth and Mathematics are my main focus in life. None of this is aimed at anyone personally. I am not at all trying to be mean or anything, quite the opposite. I have experienced a lot of suffering myself because of mistakes in the mathematical literature. For example, by thinking for several weeks that I had made a huge breakthrough only to be disappointed later when I found out that a certain theorem I used was false. I was actually lucky that I hadn't made my work public yet, I can't imagine the pain, stigma and public humiliation if I had made my work public. It is therefore my sincere belief that the above question will actually reduce the total amount of suffering by mathematicians in the world. Sure, some retired mathematicians will be disappointed if they find out that some part of their work is wrong, but the suffering will end there and not propagate further to future mathematicians. As a serious mathematician, is it really better to die without knowing the truth? If you reap what you sow, if there is a law of karma, then it is only in your best interest that your mistakes are corrected quickly and don't propagate and become the reason for further suffering in the world. Your own total suffering would only increase then. May the truth set us free.*