There is an adjunction between polyquivers and strict monoidal categories, given by planar string diagrams as in the work of Joyal and Street.
References
- The Geometry of Tensor Calculus I (Joyal, Street), using tensor schemas (Definition 1.4)
There is an adjunction between polyquivers and strict monoidal categories, given by planar string diagrams as in the work of Joyal and Street.