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Being Van Kampen is a universal property

Pawel Sobocinski ; Tobias Heindel.

Colimits that satisfy the Van Kampen condition have interesting exactness properties. We show that the elementary presentation of the Van Kampen condition is actually a characterisation of a universal property in the associated bicategory of spans. The main theorem states that Van Kampen cocones are&nbsp;[&hellip;]

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Connector algebras for C/E and P/T nets' interactions

Roberto Bruni ; Hernan Melgratti ; Ugo Montanari ; Pawel Sobocinski.

A quite flourishing research thread in the recent literature on component-based systems is concerned with the algebraic properties of different classes of connectors. In a recent paper, an algebra of stateless connectors was presented that consists of five kinds of basic connectors, namely symmetry,&nbsp;[&hellip;]

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Monoidal Width

Elena Di Lavore ; Paweł Sobociński.

We introduce monoidal width as a measure of complexity for morphisms in monoidal categories. Inspired by well-known structural width measures for graphs, like tree width and rank width, monoidal width is based on a notion of syntactic decomposition: a monoidal decomposition of a morphism is an&nbsp;[&hellip;]

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