| 释义 |
period parallelogram [¦pir·ē·ǝd ´par·ǝ`lel·ǝ´gram] MATHEMATICS For a doubly periodic function f(z) of a complex variable, a parallelogram with vertices at z0, z0 + a, z0 + a + b, and z0 + b, where z0 is any complex number, and a and b are periods of f (z ) but are not necessarily primitive periods. |