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Mirrors > Home > MPE Home > Th. List > ralcom | Structured version Visualization version GIF version |
Description: Commutation of restricted universal quantifiers. See ralcom2 3374 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3374 since it depends on a smaller set of axioms. (Contributed by NM, 13-Oct-1999.) (Revised by Mario Carneiro, 14-Oct-2016.) |
Ref | Expression |
---|---|
ralcom | ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ancomst 466 | . . . 4 ⊢ (((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
2 | 1 | 2albii 1823 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
3 | alcom 2157 | . . 3 ⊢ (∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑) ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
4 | 2, 3 | bitri 275 | . 2 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
5 | r2al 3195 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
6 | r2al 3195 | . 2 ⊢ (∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
7 | 4, 5, 6 | 3bitr4i 303 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 205 ∧ wa 397 ∀wal 1540 ∈ wcel 2107 ∀wral 3062 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1914 ax-11 2155 |
This theorem depends on definitions: df-bi 206 df-an 398 df-ex 1783 df-ral 3063 |
This theorem is referenced by: rexcom 3288 ralrot3 3291 ralcom13 3292 ralcom13OLD 3293 2reu4lem 4525 ssint 4968 iinrab2 5073 disjxun 5146 reusv3 5403 cnvpo 6284 cnvso 6285 dfpo2 6293 fununi 6621 isocnv2 7325 dfsmo2 8344 tz7.48lem 8438 ixpiin 8915 boxriin 8931 dedekind 11374 rexfiuz 15291 gcdcllem1 16437 mreacs 17599 comfeq 17647 catpropd 17650 isnsg2 19031 cntzrec 19195 oppgsubm 19224 opprirred 20229 opprsubrg 20377 rmodislmodlem 20532 rmodislmod 20533 rmodislmodOLD 20534 islindf4 21385 cpmatmcllem 22212 tgss2 22482 ist1-2 22843 kgencn 23052 ptcnplem 23117 cnmptcom 23174 fbun 23336 cnflf 23498 fclsopn 23510 cnfcf 23538 isclmp 24605 isncvsngp 24658 caucfil 24792 ovolgelb 24989 dyadmax 25107 ftc1a 25546 ulmcau 25899 noetasuplem4 27229 conway 27290 cofcutr 27401 addsprop 27450 perpcom 27954 colinearalg 28158 uhgrvd00 28781 pthdlem2lem 29014 frgrwopregbsn 29560 phoeqi 30098 ho02i 31070 hoeq2 31072 adjsym 31074 cnvadj 31133 mddmd2 31550 cdj3lem3b 31681 mgccnv 32157 cvmlift2lem12 34294 elpotr 34742 fvineqsnf1 36280 poimirlem29 36506 heicant 36512 ispsubsp2 38606 fsuppind 41160 nla0003 42162 ntrclsiso 42804 ntrneiiso 42828 ntrneik2 42829 ntrneix2 42830 ntrneik3 42833 ntrneix3 42834 ntrneik13 42835 ntrneix13 42836 ntrneik4w 42837 imo72b2 42910 tratrb 43283 hbra2VD 43607 tratrbVD 43608 opprsubrng 46723 |
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