By Gregory Zuckerman and Bradley Hope Updated May 21, 2017 3:10 p.m. ET
Alexey Poyarkov, a former gold-medal winner of the International Mathematical Olympiad for high-school students, spent most of his early career honing algorithms at technology companies such as Microsoft Corp., where he helped make the Bing search engine smarter at ferreting out pornography.
Last year, a bidding war for Mr. Poyarkov broke out among hedge-fund heavyweights Renaissance Technologies LLC, Citadel LLC and TGS…
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