Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > ceqsexv | Structured version Visualization version GIF version |
Description: Elimination of an existential quantifier, using implicit substitution. (Contributed by NM, 2-Mar-1995.) |
Ref | Expression |
---|---|
ceqsexv.1 | ⊢ 𝐴 ∈ V |
ceqsexv.2 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
Ref | Expression |
---|---|
ceqsexv | ⊢ (∃𝑥(𝑥 = 𝐴 ∧ 𝜑) ↔ 𝜓) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nfv 1915 | . 2 ⊢ Ⅎ𝑥𝜓 | |
2 | ceqsexv.1 | . 2 ⊢ 𝐴 ∈ V | |
3 | ceqsexv.2 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
4 | 1, 2, 3 | ceqsex 3540 | 1 ⊢ (∃𝑥(𝑥 = 𝐴 ∧ 𝜑) ↔ 𝜓) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1537 ∃wex 1780 ∈ wcel 2114 Vcvv 3494 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-12 2177 ax-ext 2793 |
This theorem depends on definitions: df-bi 209 df-an 399 df-ex 1781 df-nf 1785 df-cleq 2814 df-clel 2893 |
This theorem is referenced by: ceqsexv2d 3542 ceqsex2v 3544 ceqsex3v 3545 gencbvex 3549 euxfr2w 3711 euxfr2 3713 inuni 5246 eqvinop 5378 elvvv 5627 dmfco 6757 fndmdif 6812 fndmin 6815 fmptco 6891 abrexco 7003 uniuni 7484 elxp4 7627 elxp5 7628 brtpos2 7898 xpsnen 8601 xpcomco 8607 xpassen 8611 dfac5lem2 9550 cf0 9673 ltexprlem4 10461 pceu 16183 4sqlem12 16292 vdwapun 16310 gsumval3eu 19024 dprd2d2 19166 znleval 20701 metrest 23134 fmptcof2 30402 fpwrelmapffslem 30468 cusgredgex 32368 dfdm5 33016 dfrn5 33017 elima4 33019 brtxp 33341 brpprod 33346 elfix 33364 dfiota3 33384 brimg 33398 brapply 33399 brsuccf 33402 funpartlem 33403 brrestrict 33410 dfrecs2 33411 dfrdg4 33412 lshpsmreu 36260 isopos 36331 islpln5 36686 islvol5 36730 cdlemftr3 37716 dibelval3 38298 dicelval3 38331 mapdpglem3 38826 hdmapglem7a 39078 diophrex 39392 |
Copyright terms: Public domain | W3C validator |