Were thereWhat are the most famous examples of PhD advisors in mathematics, younger than their student?
If so, what are(if possible put the more famous examples?date of birth and/or the difference in age).
Post Closed as "Not suitable for this site" by Qiaochu Yuan, Igor Pak, Stefan Waldmann, Chris Godsil, Eric Wofsey
Post Reopened by Sebastien Palcoux, Peter LeFanu Lumsdaine, Igor Rivin, Bjørn Kjos-Hanssen, Vivek Shende
Post Closed as "Not suitable for this site" by Peter Crooks, Ulrich Pennig, Alex Degtyarev, Daniel Moskovich, Suvrit