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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 2774 | . 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 1331 ∃wex 1468 ∈ wcel 1480 Vcvv 2686 |
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 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-v 2688 |
This theorem is referenced by: bnd2 4097 mss 4148 exss 4149 snnex 4369 opeldm 4742 elrnmpt1 4790 xpmlem 4959 ffoss 5399 ssimaex 5482 fvelrn 5551 eufnfv 5648 foeqcnvco 5691 cnvoprab 6131 domtr 6679 ensn1 6690 ac6sfi 6792 difinfsn 6985 0ct 6992 ctmlemr 6993 ctssdclemn0 6995 ctssdclemr 6997 ctssdc 6998 omct 7002 ctssexmid 7024 exmidfodomrlemim 7057 zfz1iso 10584 ennnfonelemim 11937 ctinfom 11941 ctinf 11943 qnnen 11944 enctlem 11945 ctiunct 11953 subctctexmid 13196 |
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