Does combinatorial mean discrete ?
closed as off topic by Akhil Mathew, Qiaochu Yuan, Eric O. Korman, Larry Wang, Casebash Jul 29 '10 at 21:06
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Combinatorics is a subset of discrete mathematics.
Combinatorics is the study of the ways discrete structures can be arranged/combined. Discrete mathematics is the study of all aspects of discrete structures (thus including combinatorics).