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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 3365 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3365 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 470 | . . . 4 ⊢ (((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
| 2 | 1 | 2albii 1852 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2198 | . . 3 ⊢ (∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑) ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
| 4 | 2, 3 | bitri 278 | . 2 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 5 | r2al 3201 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3201 | . 2 ⊢ (∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑 ↔ ∀𝑦∀𝑥((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
| 7 | 4, 5, 6 | 3bitr4i 306 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 ∀𝑥 ∈ 𝐴 𝜑) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 ∀wal 1567 ∈ wcel 2146 ∀wral 3079 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1944 ax-11 2196 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1812 df-ral 3080 |
| This theorem is used by: rexcom 3294 ralrot3 3296 ralcom13 3297 2reu4lem 4481 ssint 4926 iinrab2 5030 disjxun 5103 reusv3 5370 cnvpo 6296 cnvso 6297 dfpo2 6305 fununi 6623 isocnv2 7346 dfsmo2 8366 tz7.48lemOLD 8462 ixpiin 8963 boxriin 8979 dedekind 11483 rexfiuz 15527 gcdcllem1 16681 mreacs 17844 comfeq 17892 catpropd 17895 isnsg2 19378 cntzrec 19562 oppgsubm 19588 opprirred 20664 opprsubrng 20823 opprsubrg 20857 opprdomnb 20980 rmodislmodlem 21216 rmodislmod 21217 islindf4 22156 cpmatmcllem 23048 tgss2 23317 ist1-2 23677 kgencn 23887 ptcnplem 23952 cnmptcom 24009 fbun 24171 cnflf 24333 fclsopn 24345 cnfcf 24373 isclmp 25430 isncvsngp 25482 caucfil 25616 ovolgelb 25813 dyadmax 25931 ftc1a 26369 ulmcau 26734 noetasuplem4 28105 conway 28177 cofcutr 28322 addsprop 28374 onsfi 28754 perpcom 29200 colinearalg 29500 uhgrvd00 30127 pthdlem2lem 30365 frgrwopregbsn 30930 phoeqi 31471 ho02i 32443 hoeq2 32445 adjsym 32447 cnvadj 32506 mddmd2 32923 cdj3lem3b 33054 mgccnv 33613 cvmlift2lem12 36200 elpotr 36670 nmulcom 37070 fvineqsnf1 38473 poimirlem29 38707 heicant 38713 disjimeceqim 39876 ispsubsp2 40943 fsuppind 43758 nla0003 44566 ntrclsiso 45207 ntrneiiso 45231 ntrneik2 45232 ntrneix2 45233 ntrneik3 45236 ntrneix3 45237 ntrneik13 45238 ntrneix13 45239 ntrneik4w 45240 imo72b2 45312 tratrb 45658 hbra2VD 45981 tratrbVD 45982 termopropd 50505 |
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