Strang s analysis applies to so-called banded matrices. Most of the Numbers in a banded matrix are zeroes; the only exceptions fall along diagonal bands, at or near the central diagonal of the matrix.

Strang的分析被应用于所谓的带状矩阵上；带状矩阵的绝大多数项都是0；唯一的例外是矩阵中心或靠近矩阵中心的对角带。