-tuple. When the index set could be the list of all purely natural quantities an indexed family is known as a sequence. plus the list of all authentic quantities hold the similar cardinality, a bijection remaining furnished by the operate x ↦ tan ( π x https://d-ch-v-c-ng-tphcm49369.theobloggers.com/42302706/5-simple-statements-about-dịch-vụ-Đồ-cúng-trọn-gói-explained