Shaposhnikova, Tatyana Three high-stakes math exams. (English) Zbl 1173.01323 Math. Intell. 27, No. 3, 44-46 (2005). Three examples are given of dramatic life situations in which to answer or of a mathematical question became decisive for the fate of some today wellknown mathematicians. Jacob David Tamarkin had to answer a question of analytic geometry raised by an American consul. Igor Tamm (co-recipient of the Nobel prize in Physics, in 1958) had to answer a question of estimation of error one makes by cutting off MacLaurin’s series at the $n$-th term, raised by an Ataman. Gaetano Fichera had to give a sufficient condition for interchanging limit and integration, a question raised by a student of mathematics from the University of Bologna.Reviewer: Solomon Marcus (Bucureşti) MSC:01A70Biographies, obituaries, personalia, bibliographiesKeywords:analytic geometry; MacLaurin’s series; integration BibTeX Full Text: DOI References:  A. F. Andreev (Ed.),Kapitsa, Tamm, Semionov in Reminiscences and Letters, (Russian), Vargius, 1998.  G. Fichera,lntorno al passaggio al limite sotto il segno ďintegrale, Portugalie Math.,4(1943), 1--20. · Zbl 0063.01364  G. Gamow,My World Line, The Viking Press, 1970.  E. Hille,Jacob David Tamarkin--his life and work, Bull. Amer. Math. Soc.,52 (1947), 440--457. · Zbl 0031.09911 · doi:10.1090/S0002-9904-1947-08789-9  O. Oleïnik,The life and scientific work of Gaetano Fichera, Rend. Suppl. Acc. Lincei,9(1997), 9--33.