Ideals and clots in universal algebra and in semi-abelian categories

Semi-abelian categories

George Janelidze, L. Márki, Walter Tholen · Journal of Pure and Applied Algebra · 2002 · 478 citations

Groups with Multiple Operators

Paul Higgins · Proceedings of the London Mathematical Society · 1956 · 212 citations

Natural Sciences, Mathematics, Algebra +9

Ideals in universal algebras

H. Peter Gumm, Aldo Ursini · Algebra Universalis · 1984 · 163 citations

Natural Sciences, Mathematics, Algebra +6

Duality for groups

Saunders MacLane · Bulletin of the American Mathematical Society · 1950 · 151 citations · Full text

On subtractive varieties, I

Aldo Ursini · Algebra Universalis · 1994 · 123 citations

Natural Sciences, Mathematics, Algebra +3