| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > spcegv | GIF version | ||
| Description: Existential specialization, using implicit substitution. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| spcgv.1 | ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) |
| Ref | Expression |
|---|---|
| spcegv | ⊢ (𝐴 ∈ 𝑉 → (𝜓 → ∃𝑥𝜑)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | nfcv 2392 | . 2 ⊢ Ⅎ𝑥𝐴 | |
| 2 | nfv 1581 | . 2 ⊢ Ⅎ𝑥𝜓 | |
| 3 | spcgv.1 | . 2 ⊢ (𝑥 = 𝐴 → (𝜑 ↔ 𝜓)) | |
| 4 | 1, 2, 3 | spcegf 2908 | 1 ⊢ (𝐴 ∈ 𝑉 → (𝜓 → ∃𝑥𝜑)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 = wceq 1402 ∃wex 1545 ∈ wcel 2209 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-v 2823 |
| This theorem is used by: spcedv 2914 spcev 2920 elabd 2971 eqeu 2996 absneu 3783 elunii 3940 axpweq 4308 euotd 4395 brcogw 4949 opeldmg 4986 breldmg 4987 dmsnopg 5259 dff3im 5853 elunirn 5972 unielxp 6408 op1steq 6413 tfr0dm 6593 tfrlemibxssdm 6598 tfrlemiex 6602 tfr1onlembxssdm 6614 tfr1onlemex 6618 tfrcllembxssdm 6627 tfrcllemex 6631 frecabcl 6670 ertr 6822 f1oen4g 7038 f1dom4g 7039 f1oen3g 7040 f1dom2g 7042 f1domg 7044 dom3d 7060 en1 7086 en2 7112 phpelm 7168 isinfinf 7201 ordiso 7377 djudom 7434 difinfsn 7441 ctm 7450 enumct 7456 djudoml 7576 djudomr 7577 cc2lem 7633 recexnq 7758 ltexprlemrl 7978 ltexprlemru 7980 recexprlemm 7992 recexprlemloc 7999 recexprlem1ssl 8001 recexprlem1ssu 8002 axpre-suploclemres 8269 frecuzrdgtcl 10864 frecuzrdgfunlem 10871 fihasheqf1oi 11242 zfz1isolem1 11308 climeu 12081 fsum3 12173 uzwodc 12833 gzsumfzval 13764 mplsubgfilemm 15180 eltg3 15249 uptx 15466 xblm 15609 2lgslem1 16376 upgrex 16510 vtxdumgrfival 16705 1loopgrvd2fi 16712 bj-2inf 17130 subctctexmid 17196 |
| Copyright terms: Public domain | W3C validator |