tsondru / catgraph Star 1 Code Issues Pull requests Cospans, spans, hypergraph rewriting (DPO), multiway evolution, discrete curvature, Petri nets, Frobenius algebras, wiring diagrams, E_n operads, compact closed categories, and lattice gauge theory in Rust — applied category theory for compositional systems, with SurrealDB persistence rust category-theory petri-net hypergraph spans wiring-diagram discrete-curvature surrealdb operad gauge-theory rustworkx cospans dpo-rewriting multiway-systems frobenius-algebra compact-closed Updated Apr 8, 2026 Rust