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Alexander MarkusMoldovan and Israeli mathematician.
Date of Birth: 03.12.1932
Country:  Israel |
Content:
- Aleksandr (Alik) Markus: Moldovan and Israeli Mathematician
- Academic Career
- Emigration to Israel
- Research Contributions
- Publications
- "Introduction to the Spectral Theory of Polynomial Operator Pencils"
- Legacy
Aleksandr (Alik) Markus: Moldovan and Israeli Mathematician
Early Life and EducationAleksandr Simhovich Markus was born in Zahareyevka, Ukraine, in 1938. His parents were Jewish school teachers. After his father's death in World War II, Markus and his mother moved to Soroca, Moldova, in 1944. He attended Soroca High School and later the University of Chișinău.
Academic Career
In 1955, Markus published his first scientific paper in "Doklady Akademii Nauk SSSR." In 1959, he defended his Candidate's Dissertation at Baku State University. In 1960, along with his supervisor, Israel Gohberg, he proved the Gohberg-Markus Conjecture, a fundamental result in combinatorial geometry.
Markus completed his Doctoral Dissertation under Gohberg's guidance, but it was not approved. He worked at the Academy of Sciences of Moldovan SSR and the Faculty of Mathematics at Chișinău State University.
Emigration to Israel
In 1990, Markus emigrated to Israel and became a professor in the Department of Mathematics and Computer Science at Ben-Gurion University of the Negev in Be'er Sheva. He held the rank of emeritus professor from 2003.
Research Contributions
Markus's primary research interests were in functional analysis and linear algebra, including matrix theory, spectral theory of linear operators, and control theory. He made significant contributions to the Gohberg-Krein-Markus theory of extended Krein spaces.
Publications
Markus published several monographs, including:"Comparison Theorems for Spectra of Linear Operators and the Keldysh Asymptotics for Bundles" (with V. I. Matsaev)
"Introduction to the Spectral Theory of Polynomial Operator Pencils"
"Theory of Commuting Nonselfadjoint Operators" (with M. S. Livshits, N. Kravitsky, and V. Vinnikov)
"Linear Algebra and Applications: Special Volume Dedicated to P. Lancaster" (editor)
Legacy
Aleksandr Markus left a lasting legacy through his groundbreaking research and mentoring of a generation of mathematicians. Among his students were Leonid Lerer, Ilya Mereuța, and Vadim Olshevsky.
