Sabir Medgidovich Gusein-Zade (Russian: Сабир Меджидович Гусейн-Заде; born 29 July 1950 in Moscow[1]) is a Russian mathematician and a specialist in singularity theory and its applications.[2]
He studied at Moscow State University, where he earned his Ph.D. in 1975 under the joint supervision of Sergei Novikov and Vladimir Arnold.[3] Before entering the university, he had earned a gold medal at the International Mathematical Olympiad.[2]
Gusein-Zade co-authored with V. I. Arnold and A. N. Varchenko the textbook Singularities of Differentiable Maps (published in English by Birkhäuser).[2]
A professor in both the Moscow State University and the Independent University of Moscow, Gusein-Zade also serves as co-editor-in-chief for the Moscow Mathematical Journal.[4] He shares credit with Norbert A'Campo for results on the singularities of plane curves.[5][6][7]
An important result, due independently to A'Campo and Gusein-Zade, asserts that every plane curve singularity is equisingular to one defined over and admitting a real morsification with only 3 critical values.
I would have liked to introduce the beautiful results of A'Campo and Gusein-Zade on the computation of the monodromy groups of plane curves. Translated from the German original by John Stillwell, 2012 reprint of the 1986 edition.
For map-germs very little is known about the existence of M-deformations beyond the classical result by A'Campo and Gusein–Zade that plane curve-germs always have M-deformations.
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: CS1 maint: DOI inactive as of November 2024 (link)