论文标题
关系半群和无对象类别
Relational Semigroups and Object-Free Categories
论文作者
论文摘要
本说明将部分半群和单型物体与无对象类别（具有多个单单元或源图和目标图的小型类别）相关联。我们讨论了零元素与两种类别的邻接，并提供将代数所考虑的示例分开的示例。
This note relates axioms for partial semigroups and monoids with those for small object-free categories, either with multiple monoidal units or with source and target maps. We discuss the adjunction of a zero element to both kinds of category and provide examples that separate the algebras considered.
