1. If I is a topology on X, which of the following is not true? (a) Arbitrary union of elements of I is in I. (b) Finite
Posted: Wed May 11, 2022 9:37 pm
- 1 If I Is A Topology On X Which Of The Following Is Not True A Arbitrary Union Of Elements Of I Is In I B Finite 1 (30.52 KiB) Viewed 26 times
1. If I is a topology on X, which of the following is not true? (a) Arbitrary union of elements of I is in I. (b) Finite union of elements of I is in I. (c) Finite intersection of elements of 9 is in I. (d) None of the previous choices. 2. Which of the following is a topology on X = {1,2,3,4}? (a) {Ø,{1}, {2,3}, X} (b) {ø,{1}, {1,3}, X} (c) {ø, {1,2}, {2,3,4}, X} (d) {ø, {1, 2},{4}, X}