Cleo (Mathematician)

Vladimir Reshetnikov, an Uzbekistani-American software developer and mathematician, operated under the pseudonym "Cleo" on Stack Exchange between 2013 and 2015, posting 39 answers to complex mathematical integration problems with remarkable accuracy but no explanation of methodology. His identity remained mysterious until January 2025, when internet sleuths revealed who he was, sparking comparisons to historical mathematical figures like Ramanujan who also provided solutions without conventional proofs. The mysterious account claimed limitations due to an unspecified medical condition and generated significant debate about whether Cleo was a single genius or a collective system.