block
- unknown
- block – Every block (maximal 2-connected subgraph) is a clique.
- block upper bounds chordal by a constant
- bounded chordal does not imply bounded block
- cluster upper bounds block by a constant
- bounded block does not imply bounded cluster
- forest upper bounds block by a constant
- bounded block does not imply bounded forest
- block upper bounds distance to block by a constant – by definition