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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 2325. (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 2676 | . . . . . 6 ⊢ (𝑧 = 𝑥 → (𝑧 ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
2 | 1 | dvelimv 2326 | . . . . 5 ⊢ (¬ ∀𝑦 𝑦 = 𝑥 → (𝑥 ∈ 𝐴 → ∀𝑦 𝑥 ∈ 𝐴)) |
3 | rgen2a.1 | . . . . . . 7 ⊢ ((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐴) → 𝜑) | |
4 | 3 | ex 449 | . . . . . 6 ⊢ (𝑥 ∈ 𝐴 → (𝑦 ∈ 𝐴 → 𝜑)) |
5 | 4 | alimi 1730 | . . . . 5 ⊢ (∀𝑦 𝑥 ∈ 𝐴 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
6 | 2, 5 | syl6com 36 | . . . 4 ⊢ (𝑥 ∈ 𝐴 → (¬ ∀𝑦 𝑦 = 𝑥 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑))) |
7 | eleq1 2676 | . . . . . . 7 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 ↔ 𝑥 ∈ 𝐴)) | |
8 | 7 | biimpd 218 | . . . . . 6 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 → 𝑥 ∈ 𝐴)) |
9 | 8, 4 | syli 38 | . . . . 5 ⊢ (𝑦 = 𝑥 → (𝑦 ∈ 𝐴 → 𝜑)) |
10 | 9 | alimi 1730 | . . . 4 ⊢ (∀𝑦 𝑦 = 𝑥 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
11 | 6, 10 | pm2.61d2 171 | . . 3 ⊢ (𝑥 ∈ 𝐴 → ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) |
12 | df-ral 2901 | . . 3 ⊢ (∀𝑦 ∈ 𝐴 𝜑 ↔ ∀𝑦(𝑦 ∈ 𝐴 → 𝜑)) | |
13 | 11, 12 | sylibr 223 | . 2 ⊢ (𝑥 ∈ 𝐴 → ∀𝑦 ∈ 𝐴 𝜑) |
14 | 13 | rgen 2906 | 1 ⊢ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐴 𝜑 |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ∧ wa 383 ∀wal 1473 ∈ wcel 1977 ∀wral 2896 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-cleq 2603 df-clel 2606 df-ral 2901 |
This theorem is referenced by: sosn 5111 isoid 6479 f1owe 6503 ordon 6874 fnwelem 7179 issmo 7332 oawordeulem 7521 ecopover 7738 ecopoverOLD 7739 unfilem2 8110 dffi2 8212 inficl 8214 fipwuni 8215 fisn 8216 dffi3 8220 cantnfvalf 8445 r111 8521 alephf1 8791 alephiso 8804 dfac5lem4 8832 kmlem9 8863 ackbij1lem17 8941 fin1a2lem2 9106 fin1a2lem4 9108 axcc2lem 9141 nqereu 9630 addpqf 9645 mulpqf 9647 genpdm 9703 axaddf 9845 axmulf 9846 subf 10162 mulnzcnopr 10552 negiso 10880 cnref1o 11703 xaddf 11929 xmulf 11974 ioof 12142 om2uzf1oi 12614 om2uzisoi 12615 wwlktovf1 13548 reeff1 14689 divalglem9 14962 bitsf1 15006 gcdf 15072 eucalgf 15134 qredeu 15210 1arith 15469 vdwapf 15514 catideu 16159 sscres 16306 fpwipodrs 16987 letsr 17050 mgmidmo 17082 frmdplusg 17214 nmznsg 17461 efgred 17984 isabli 18030 brric 18567 xrsmgm 19600 xrs1cmn 19605 xrge0subm 19606 xrsds 19608 cnsubmlem 19613 cnsubrglem 19615 nn0srg 19635 rge0srg 19636 fibas 20592 fctop 20618 cctop 20620 iccordt 20828 fsubbas 21481 zfbas 21510 ismeti 21940 dscmet 22187 qtopbaslem 22372 tgqioo 22411 xrsxmet 22420 xrsdsre 22421 retopcon 22440 iccconn 22441 iimulcn 22545 icopnfhmeo 22550 iccpnfhmeo 22552 xrhmeo 22553 iundisj2 23124 reefiso 24006 recosf1o 24085 rzgrp 24104 ercgrg 25212 isabloi 26789 cncph 27058 hvsubf 27256 hhip 27418 hhph 27419 helch 27484 hsn0elch 27489 hhssabloilem 27502 hhshsslem2 27509 shscli 27560 shintcli 27572 pjmf1 27959 idunop 28221 idhmop 28225 0hmop 28226 adj0 28237 lnopunii 28255 lnophmi 28261 riesz4i 28306 cnlnadjlem9 28318 adjcoi 28343 bra11 28351 pjhmopi 28389 iundisj2f 28785 iundisj2fi 28943 xrstos 29010 xrge0omnd 29042 reofld 29171 xrge0slmod 29175 iistmd 29276 cnre2csqima 29285 mndpluscn 29300 raddcn 29303 xrge0iifiso 29309 xrge0iifmhm 29313 xrge0pluscn 29314 br2base 29658 sxbrsiga 29679 signswmnd 29960 indispcon 30470 iooscon 30483 soseq 30995 f1omptsnlem 32359 isbasisrelowl 32382 poimirlem27 32606 exidu1 32825 rngoideu 32872 isomliN 33544 idlaut 34400 mzpclall 36308 kelac2lem 36652 clsk1indlem3 37361 icof 38406 prmdvdsfmtnof1 40037 plusfreseq 41562 nnsgrpmgm 41606 nnsgrp 41607 2zrngamgm 41729 2zrngmmgm 41736 |
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