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Mirrors > Home > ILE Home > Th. List > Mathboxes > bdrmo | GIF version |
Description: Boundedness of existential at-most-one. (Contributed by BJ, 16-Oct-2019.) |
Ref | Expression |
---|---|
bdrmo.1 | ⊢ BOUNDED 𝜑 |
Ref | Expression |
---|---|
bdrmo | ⊢ BOUNDED ∃*𝑥 ∈ 𝑦 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bdrmo.1 | . . . 4 ⊢ BOUNDED 𝜑 | |
2 | 1 | ax-bdex 10610 | . . 3 ⊢ BOUNDED ∃𝑥 ∈ 𝑦 𝜑 |
3 | 1 | bdreu 10646 | . . 3 ⊢ BOUNDED ∃!𝑥 ∈ 𝑦 𝜑 |
4 | 2, 3 | ax-bdim 10605 | . 2 ⊢ BOUNDED (∃𝑥 ∈ 𝑦 𝜑 → ∃!𝑥 ∈ 𝑦 𝜑) |
5 | rmo5 2569 | . 2 ⊢ (∃*𝑥 ∈ 𝑦 𝜑 ↔ (∃𝑥 ∈ 𝑦 𝜑 → ∃!𝑥 ∈ 𝑦 𝜑)) | |
6 | 4, 5 | bd0r 10616 | 1 ⊢ BOUNDED ∃*𝑥 ∈ 𝑦 𝜑 |
Colors of variables: wff set class |
Syntax hints: → wi 4 ∃wrex 2349 ∃!wreu 2350 ∃*wrmo 2351 BOUNDED wbd 10603 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-bd0 10604 ax-bdim 10605 ax-bdan 10606 ax-bdal 10609 ax-bdex 10610 ax-bdeq 10611 |
This theorem depends on definitions: df-bi 115 df-nf 1390 df-sb 1686 df-eu 1944 df-mo 1945 df-cleq 2074 df-clel 2077 df-ral 2353 df-rex 2354 df-reu 2355 df-rmo 2356 |
This theorem is referenced by: (None) |
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