# OCME · 知識與練習查找

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.

## 第 34981 題：二元關係的第一投影

- ID: `q-20261003-advance-20261004-r03-relation-0031`; number: 34981
- Processing: second_context_reviewed
- MKO: [mko-relation](/zh-Hant/mko/mko-relation/)
- Family: [qf-relation-domain-projection](/zh-Hant/explore/?family=qf-relation-domain-projection)
- Batch: [batch-20261003-advance-20261004-r03-relation-foundations](/zh-Hant/explore/?batch=batch-20261003-advance-20261004-r03-relation-foundations)
- [Derivation](/zh-Hant/questions/q-20261003-advance-20261004-r03-relation-0031/) / [Markdown](/zh-Hant/questions/q-20261003-advance-20261004-r03-relation-0031/index.md) / [JSON](/data/question-derivations/questions/q-20261003-advance-20261004-r03-relation-0031.json)