# OCME · Knowledge & practice explorer

302 MKO / 1,441 families / 360 batches / 36,000 questions.

36,000 second-context math/bilingual reviewed; 0 display/symbol-checked candidates. Source questions: candidate. English: ai_candidate. No new proof, Lean, SREG or training.

1 results; page 1/1.

## Question 9500: One Declared Target-Open Preimage

- ID: `q-20261013-advance-20261019-r03-topological-continuity-0025`; number: 9500
- Processing: second_context_reviewed
- MKO: [mko-topological-continuity](/en/mko/mko-topological-continuity/)
- Family: [qf-ext19-continuity-single-preimage](/en/explore/?family=qf-ext19-continuity-single-preimage)
- Batch: [batch-20261013-advance-20261019-r03-topological-continuity-foundations](/en/explore/?batch=batch-20261013-advance-20261019-r03-topological-continuity-foundations)
- [Derivation](/en/questions/q-20261013-advance-20261019-r03-topological-continuity-0025/) / [Markdown](/en/questions/q-20261013-advance-20261019-r03-topological-continuity-0025/index.md) / [JSON](/data/question-derivations/questions/q-20261013-advance-20261019-r03-topological-continuity-0025.json)