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We have established that there is a homomorphism called θ from B, the PROP of diagrams, to Mat, the PROP of matrices. I've never seen such a complex subject as
by KKKKkkkk1 7y ago
We have established that there is a homomorphism called θ from B, the PROP of diagrams, to Mat, the PROP of matrices.
I've never seen such a complex subject as linear algebra presented with such clarity and simplicity.
- lonelappde 7y agoAre you being sarcastic?
- keithalewis 7y agoYa think? I like how Werner Heisenberg (re)invented matrix multiplication. If e_ij represents a transition from i -> j and e_ij e_kl = e_il if j == k and 0 otherwise, then A = sum_ij, a_ij e_ij represents the matrix A = [a_ij] and AB, using this rule, is matrix multiplication.