Primitive, Almost Primitive, Test, and Δ-Primitive Elements of Free Algebras with the Nielsen–Schreier Property

Combinatorial Group Theory.

P. M. Cohn, Wilhelm Magnus, A. Karrass et al. · American Mathematical Monthly · 1967 · 1.3K citations

Combinatorial group theory

Mose Newman · Journal of the Franklin Institute · 1967 · 654 citations

Projective modules over polynomial rings are free

Andrei Suslin · Proceedings of the USSR Academy of Sciences · 1976 · 184 citations

Natural Sciences, Adult Education, Algebra +4

On Certain Sets of Elements in a Free Group

J. H. C. Whitehead · Proceedings of the London Mathematical Society · 1936 · 170 citations

Natural Sciences, Mathematics, Set Theory +5

Primitives in the free group on two generators

R. P. Osborne, Heiner Zieschang · Inventiones mathematicae · 1981 · 112 citations

Natural Sciences, Communication, Freedom Of Expression +3