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Mirrors > Home > ILE Home > Th. List > spcev | GIF version |
Description: Existential specialization, using implicit substitution. (Contributed by NM, 31-Dec-1993.) (Proof shortened by Eric Schmidt, 22-Dec-2006.) |
Ref | Expression |
---|---|
spcv.1 | ⊢ 𝐴 ∈ V |
spcv.2 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
Ref | Expression |
---|---|
spcev | ⊢ (𝜓 → ∃𝑥𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | spcv.1 | . 2 ⊢ 𝐴 ∈ V | |
2 | spcv.2 | . . 3 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
3 | 2 | spcegv 2777 | . 2 ⊢ (𝐴 ∈ V → (𝜓 → ∃𝑥𝜑)) |
4 | 1, 3 | ax-mp 5 | 1 ⊢ (𝜓 → ∃𝑥𝜑) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 = wceq 1332 ∃wex 1469 ∈ wcel 1481 Vcvv 2689 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 699 ax-5 1424 ax-7 1425 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-8 1483 ax-10 1484 ax-11 1485 ax-i12 1486 ax-bndl 1487 ax-4 1488 ax-17 1507 ax-i9 1511 ax-ial 1515 ax-i5r 1516 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-tru 1335 df-nf 1438 df-sb 1737 df-clab 2127 df-cleq 2133 df-clel 2136 df-nfc 2271 df-v 2691 |
This theorem is referenced by: bnd2 4105 mss 4156 exss 4157 snnex 4377 opeldm 4750 elrnmpt1 4798 xpmlem 4967 ffoss 5407 ssimaex 5490 fvelrn 5559 eufnfv 5656 foeqcnvco 5699 cnvoprab 6139 domtr 6687 ensn1 6698 ac6sfi 6800 difinfsn 6993 0ct 7000 ctmlemr 7001 ctssdclemn0 7003 ctssdclemr 7005 ctssdc 7006 omct 7010 ctssexmid 7032 exmidfodomrlemim 7074 cc3 7100 zfz1iso 10616 ennnfonelemim 11973 ctinfom 11977 ctinf 11979 qnnen 11980 enctlem 11981 ctiunct 11989 subctctexmid 13369 |
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