| The reason is a topic for another note, on the limitations of combinatorics in geometry. |
| A variety of applications to extremal combinatorics and computational complexity are discussed, in addition to a number of open problems. |
| His early works range over number theory, statistics, combinatorics, game theory, as well as his principal interest of commutative algebra. |
| His thesis work combined algebra and combinatorics into the new field of matrix theory. |
| His work led to considerable activity in the new area of algebraic combinatorics. |
| The problems which attracted him most were problems in combinatorics, graph theory, and number theory. |
