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Hi there everyone. Some of you may know me from the nLab or from earlier interaction here on Azimuth. I used to be in the mathematics / computer science schools at Bangor University, but `they' shut the maths section down some years ago. I still am based in North Wales.

My interests have been for a long time in the uses of category theory and homotopy theory in providing tools for the description of systems of various types. I used to use categorical models of Petri nets and Discrete Event Systems in my lectures when teaching UG maths courses.

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