János A. Csirik

János A. Csirik is a Hungarian-born mathematician based in New York City. He holds a BA in Mathematics from the University of Cambridge and a PhD in Mathematics from the University of California, Berkeley (1999), with a dissertation on the kernel of the Eisenstein ideal in number theory. After graduating he held a joint postdoctoral appointment at MSRI and Hewlett-Packard Labs, then from December 1999 to February 2003 was a Senior Technical Staff Member at AT&T Labs - Research, first in Mathematics and Cryptography and then in Algorithms and Optimization. Since February 2003 he has worked at D.E. Shaw & Co, where his personal page states he works as a quantitative analyst on quantitative finance. His published research spans number theory, cryptography and auction theory.

Notes4

• Quant employment verification: CONFIRMED. János A. Csirik held an actual quantitative-finance role: his personal professional page states 'As of February 2003, I work for D.E. Shaw & Co as a quantitative analyst', and his research focus is stated as quantitative finance. D.E. Shaw & Co (The D. E. Shaw Group, deshaw.com) is a quantitative hedge fund / investment firm, so the employer operates in quantitative finance. Identity is supported by the personal site (csirik.net), which the LinkedIn profile and index records also attribute to the same Cambridge/Berkeley mathematician in New York. Index-only records (LinkedIn enrichment / RocketReach) additionally list the current title 'Senior Vice President at D. E. Shaw & Co.', but that current-title claim rests on index/aggregator data, not an independent primary source; the confirmed underlying role is a quantitative analyst at D.E. Shaw since 2003. Prior role at AT&T Labs - Research (mathematics/cryptography) was not a finance role.Feb 11, 2003
• Personal site csirik.net self-identifies as 'János A. Csirik', a mathematician from Hungary living in New York City with wife Susan Harrington; explicitly separates himself from his father, the equally-named University of Szeged computer-science professor.Feb 11, 2003
• Career: after Berkeley (1999) held a joint postdoctoral appointment at MSRI and Hewlett-Packard Labs; from December 1999 to February 2003 was a Senior Technical Staff Member at AT&T Labs - Research, first in Mathematics and Cryptography, then Algorithms and Optimization; from February 2003 worked at D.E. Shaw & Co as a quantitative analyst.Feb 11, 2003
• Education: BA in Mathematics from the University of Cambridge and PhD in Mathematics from the University of California, Berkeley (graduated 1999).Feb 11, 2003
• IMO identity candidate: contestant 'János Csirik' representing Hungary appears in IMO results for 1988 (31.3%), 1989 (108th, Bronze, 23 pts) and 1990 (24th, Silver, 33 pts). The 1988-1990 span matches a Hungarian mathematician who would then study at Cambridge; the contestant page alone does not state a full birth identity, so the link to the Cambridge/Berkeley/D.E. Shaw person rests on name, Hungarian nationality and timeline.Jul 1, 1990
• Research output spans pure/applied mathematics, cryptography and auction theory, plus combinatorial-optimization work; a 2007 INFORMS ICS prize is credited to a 'Janos Csirik' (University of Szeged co-authorship) - likely the namesake professor, not this subject, and should not be attributed here without confirmation.Oct 1, 2007