Terms for subject Mathematics containing connected region

English	Russian
by a region is meant an open connected point set S	под областью подразумевается
connected region	связная область
doubly connected region	двусвязная область
multiply connected region	многосвязная область
non-simply-connected region	неодносвязная область (domain)
simply connected region	односвязная область
the load on the plate is distributed over a finite number of nonoverlapping simply-connected regions	распределенный по областям
triply-connected region	трижды связная область