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math.CT2009★ 12 cited
Cospans and spans of graphs: a categorical algebra for the sequential and parallel composition of discrete systems
L. de Francesco Albasini, N. Sabadini, R. F. C. Walters
We develop further the algebra of cospans and spans of graphs introduced by Katis, Sabadini and Walters for the sequential and parallel composition of processes, adding here data t…
math.CT2009★ 4 cited
The parallel composition of processes
L. de Francesco Albasini, N. Sabadini, R. F. C. Walters
We suggest that the canonical parallel operation of processes is composition in a well-supported compact closed category of spans of reflexive graphs. We present the parallel opera…