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math.GR2010
Vector Groupoids
Vasile Poputa, Gheorghe Ivan
The main purpose of this paper is to study the vector groupoids. This is an algebraic structure which combines the concepts of Brandt groupoid and vector space such that these are…
math.GR2010
A Package of Programs for Determination of Some Classes of Subgroupoids
Gheorghe Ivan, Mihai Ivan
We give three programs on computer for finding the subgroupoids, wide subgroupoids and normal subgroupoids of a finite groupoid.