Function: noun
Date: 1947
: a fundamental theorem of topology: every simple closed curve divides the plane into two regions for which it is the common boundary
Function: noun
Date: 1947
: a fundamental theorem of topology: every simple closed curve divides the plane into two regions for which it is the common boundary
Merriam Webster Collegiate English Dictionary. Merriam Webster - Энциклопедический словарь английского языка. 2012