Definition 11.1.3 (Mesh). Let $P$ be a partition of $[a, b] \subset \real$, then
\[\sigma(P) = \max_{1 \le j \le n}(x_{j} - x_{j - 1})\]
is the mesh of $P$.
Definition 11.1.3 (Mesh). Let $P$ be a partition of $[a, b] \subset \real$, then
is the mesh of $P$.