# 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 33466: The Preimage of a Union Equals the Union of Preimages

- ID: `q-20261013-advance-20261025-r05-measurable-function-0041`; number: 33466
- Processing: second_context_reviewed
- MKO: [mko-measurable-function](/en/mko/mko-measurable-function/)
- Family: [qf-mod25-measdeep-preimage-union-law](/en/explore/?family=qf-mod25-measdeep-preimage-union-law)
- Batch: [batch-20261013-advance-20261025-r05-measurable-function-foundations](/en/explore/?batch=batch-20261013-advance-20261025-r05-measurable-function-foundations)
- [Derivation](/en/questions/q-20261013-advance-20261025-r05-measurable-function-0041/) / [Markdown](/en/questions/q-20261013-advance-20261025-r05-measurable-function-0041/index.md) / [JSON](/data/question-derivations/questions/q-20261013-advance-20261025-r05-measurable-function-0041.json)