Mathematics · Topology
Find the collection of subsets which is NOT a basis for any topology on X = {a, b, c}.
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1B1 = {{a}, {b, c}}
- 2B2 = {{a, b}, {b, c}}✓
- 3B4 = {{a, b, c}}
- 4B3 = {{a}, {b}, {c}}
Correct answer
B2 = {{a, b}, {b, c}}
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