open rectangle

短语

词形变化

open rectangles 复数 open rectangles

释义与例句

n.
  1. 1.

    A rectangle in the real plane which is an open set: i.e., which does not contain its edges. If the sides of the open rectangle are parallel to the plane's axes, then the open rectangle can be described as the Cartesian product of two open intervals.

    数学