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Mirrors > Home > MPE Home > Th. List > rgen2a | Structured version Visualization version GIF version |
Description: Generalization rule for restricted quantification. Note that 𝑥 and 𝑦 are not required to be disjoint. This proof illustrates the use of dvelim 2337. (Contributed by NM, 23-Nov-1994.) (Proof shortened by Andrew Salmon, 25-May-2011.) (Proof shortened by Wolf Lammen, 1-Jan-2020.) (Proof modification is discouraged.) |
Ref | Expression |
---|---|
rgen2a.1 | ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → 𝜑) |
Ref | Expression |
---|---|
rgen2a | ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 𝜑 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq1 2689 | . . . . . 6 ⊢ (𝑧 = 𝑥 → (𝑧 ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
2 | 1 | dvelimv 2338 | . . . . 5 ⊢ (¬ ∀𝑦 𝑦 = 𝑥 → (𝑥 ∈ 𝐴 → ∀𝑦 𝑥 ∈ 𝐴)) |
3 | rgen2a.1 | . . . . . . 7 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → 𝜑) | |
4 | 3 | ex 450 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 → (𝑦 ∈ 𝐴 → 𝜑)) |
5 | 4 | alimi 1739 | . . . . 5 ⊢ (∀𝑦 𝑥 ∈ 𝐴 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
6 | 2, 5 | syl6com 37 | . . . 4 ⊢ (𝑥 ∈ 𝐴 → (¬ ∀𝑦 𝑦 = 𝑥 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑))) |
7 | eleq1 2689 | . . . . . . 7 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
8 | 7 | biimpd 219 | . . . . . 6 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐴)) |
9 | 8, 4 | syli 39 | . . . . 5 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 → 𝜑)) |
10 | 9 | alimi 1739 | . . . 4 ⊢ (∀𝑦 𝑦 = 𝑥 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
11 | 6, 10 | pm2.61d2 172 | . . 3 ⊢ (𝑥 ∈ 𝐴 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
12 | df-ral 2917 | . . 3 ⊢ (∀𝑦 ∈ 𝐴 𝜑 ↔ ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) | |
13 | 11, 12 | sylibr 224 | . 2 ⊢ (𝑥 ∈ 𝐴 → ∀𝑦 ∈ 𝐴 𝜑) |
14 | 13 | rgen 2922 | 1 ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 384 ∀wal 1481 ∈ wcel 1990 ∀wral 2912 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-tru 1486 df-ex 1705 df-nf 1710 df-cleq 2615 df-clel 2618 df-ral 2917 |
This theorem is referenced by: sosn 5188 isoid 6579 f1owe 6603 ordon 6982 fnwelem 7292 issmo 7445 oawordeulem 7634 ecopover 7851 ecopoverOLD 7852 unfilem2 8225 dffi2 8329 inficl 8331 fipwuni 8332 fisn 8333 dffi3 8337 cantnfvalf 8562 r111 8638 alephf1 8908 alephiso 8921 dfac5lem4 8949 kmlem9 8980 ackbij1lem17 9058 fin1a2lem2 9223 fin1a2lem4 9225 axcc2lem 9258 nqereu 9751 addpqf 9766 mulpqf 9768 genpdm 9824 axaddf 9966 axmulf 9967 subf 10283 mulnzcnopr 10673 negiso 11003 cnref1o 11827 xaddf 12055 xmulf 12102 ioof 12271 om2uzf1oi 12752 om2uzisoi 12753 wwlktovf1 13700 reeff1 14850 divalglem9 15124 bitsf1 15168 gcdf 15234 eucalgf 15296 qredeu 15372 1arith 15631 vdwapf 15676 catideu 16336 sscres 16483 fpwipodrs 17164 letsr 17227 mgmidmo 17259 frmdplusg 17391 nmznsg 17638 efgred 18161 isabli 18207 brric 18744 xrsmgm 19781 xrs1cmn 19786 xrge0subm 19787 xrsds 19789 cnsubmlem 19794 cnsubrglem 19796 nn0srg 19816 rge0srg 19817 fibas 20781 fctop 20808 cctop 20810 iccordt 21018 fsubbas 21671 zfbas 21700 ismeti 22130 dscmet 22377 qtopbaslem 22562 tgqioo 22603 xrsxmet 22612 xrsdsre 22613 retopconn 22632 iccconn 22633 iimulcn 22737 icopnfhmeo 22742 iccpnfhmeo 22744 xrhmeo 22745 iundisj2 23317 reefiso 24202 recosf1o 24281 rzgrp 24300 ercgrg 25412 2wspmdisj 27201 isabloi 27405 cncph 27674 hvsubf 27872 hhip 28034 hhph 28035 helch 28100 hsn0elch 28105 hhssabloilem 28118 hhshsslem2 28125 shscli 28176 shintcli 28188 pjmf1 28575 idunop 28837 idhmop 28841 0hmop 28842 adj0 28853 lnopunii 28871 lnophmi 28877 riesz4i 28922 cnlnadjlem9 28934 adjcoi 28959 bra11 28967 pjhmopi 29005 iundisj2f 29403 iundisj2fi 29556 xrstos 29679 xrge0omnd 29711 reofld 29840 xrge0slmod 29844 iistmd 29948 cnre2csqima 29957 mndpluscn 29972 raddcn 29975 xrge0iifiso 29981 xrge0iifmhm 29985 xrge0pluscn 29986 br2base 30331 sxbrsiga 30352 signswmnd 30634 indispconn 31216 ioosconn 31229 soseq 31751 f1omptsnlem 33183 isbasisrelowl 33206 poimirlem27 33436 exidu1 33655 rngoideu 33702 isomliN 34526 idlaut 35382 mzpclall 37290 kelac2lem 37634 clsk1indlem3 38341 icof 39411 prmdvdsfmtnof1 41499 sprsymrelf1 41746 uspgrsprf1 41755 plusfreseq 41772 nnsgrpmgm 41816 nnsgrp 41817 2zrngamgm 41939 2zrngmmgm 41946 |
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