Chromatic solutions. (English) Zbl 0458.05010
MSC:
05A15 | Exact enumeration problems, generating functions |
05A10 | Factorials, binomial coefficients, combinatorial functions |
05C15 | Coloring of graphs and hypergraphs |
05A15 | Exact enumeration problems, generating functions |
05A10 | Factorials, binomial coefficients, combinatorial functions |
05C15 | Coloring of graphs and hypergraphs |