While reading books, Fermat often added notes in the margin for himself. The most famous one is certainly what is called nowadays Fermat's Last Theorem which stipulates that the equation $x^n+y^n=z^n$ has no nontrivial solution as soon as $n>2$. More than three centuries of effort were needed to eventually write down a proof of this result. In this presentation, I will discuss another margin-theorem by Fermat. It is less known but still quite impressive as it took almost two centuries to the community to obtain a full proof, opening as a byproduct new topics of research.
By Christian Krattenthaler
By Christian Krattenthaler
By Christian Krattenthaler
By Christian Krattenthaler
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By Marc Moreno Maza
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By Christoph Koutschan
