At school, Maltsev demonstrated an aptitude for mathematics, and when he left school in 1927, he went to Moscow State University to study Mathematics. While he was there, he started teaching in a secondary school in Moscow. After graduating in 1931, he continued his teaching career and in 1932 was appointed as an assistant at the Ivanovo Pedagogical Institute located in Ivanovo, near Moscow.
Whilst teaching at Ivanovo, Maltsev made frequent trips to Moscow to discuss his research with Kolmogorov. Maltsev's first publications were on logic and model theory. Kolmogorov soon invited him to join his graduate programme at Moscow State University, and, maintaining his post at Ivanovo, Maltsev effectively became Kolmogorov's student.
In 1937, Maltsev published a paper on the embedding of a ring in a field. Two years later, he published a second paper where he gave necessary and sufficient conditions for a semigroup to be embeddable in a group.
Between 1939 and 1941, he studied for his doctorate at the Steklov Institute of the USSR Academy of Sciences, with a dissertation on the Structure of isomorphic representable infinite algebras and groups.
Malcev[4] proved that there is a category isomorphism between the category of torsion-free radicable nilpotent groups of finite rank and the category of nilpotent finite-dimensional rational Lie algebras. One can view this isomorphism as being given by the Campbell–Baker–Hausdorff formula. This point of view is carried further by Lazard[5] and Stewart.[6]
During the early 1960s, Maltsev worked on problems of decidability of elementary theories of various algebraic structures. He showed the undecidability of the elementary theory of finite groups, of free nilpotent groups, of free soluble groups and many others. He also proved that the class of locally free algebras has a decidable theory.
Algebraic Systems by A.I. Mal'cev, Springer-Verlag, 1973, ISBN0-387-05792-7
The metamathematics of algebraic systems, collected papers:1936-1967 by A.I. Malcev, Amsterdam, North-Holland Pub. Co., 1971, ISBN0-7204-2266-3 (xvii+494 p.; trans., ed. and provided with additional notes by Benjamin Franklin Wells, III)
Algorithms and recursive functions by A. I. Malcev, Groningen, Wolters-Noordhoff Pub. Co. 1970[7]
Foundations of linear algebra by A. I. Malcev, San Francisco, W.H. Freeman, 1963 (xi+304 p. illus.; trans. by Thomas Craig Brown; ed. by J. B. Roberts)