The Man Who Stole Infinity

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Georg Cantor’s 1874 paper transformed mathematics by demonstrating that infinities can have different sizes—most famously, that the real numbers are more numerous than the whole numbers. The discovery helped establish set theory and fundamentally changed mathematicians’ understanding of numbers and infinity. However, Quanta’s investigation reveals that Cantor was not working entirely alone. His correspondence with fellow mathematician Richard Dedekind shows that Dedekind provided a crucial simplification of the proof that Cantor ultimately published without properly acknowledging his contribution.

The article follows mathematician and science journalist Demian Goos, who searched for historical evidence surrounding the Cantor-Dedekind relationship and eventually located a previously unknown letter from 1873 that strengthens the case that Cantor deliberately concealed Dedekind’s role. 

The story does not invalidate Cantor’s mathematical achievement—he was still responsible for the fundamental result establishing different sizes of infinity—but it challenges the traditional image of him as a solitary genius. Instead, it illustrates how mathematics is a collective human enterprise, shaped by collaboration, competition, ambition, personal relationships and disputes over intellectual credit. 

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