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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 3349 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3349 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 464 | . . . 4 ⊢ (((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
| 2 | 1 | 2albii 1822 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2165 | . . 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 3174 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3174 | . 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 206 ∧ wa 395 ∀wal 1540 ∈ wcel 2114 ∀wral 3052 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-11 2163 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1782 df-ral 3053 |
| This theorem is referenced by: rexcom 3267 ralrot3 3269 ralcom13 3270 2reu4lem 4478 ssint 4921 iinrab2 5027 disjxun 5098 reusv3 5352 cnvpo 6253 cnvso 6254 dfpo2 6262 fununi 6575 isocnv2 7287 dfsmo2 8289 tz7.48lem 8382 ixpiin 8874 boxriin 8890 dedekind 11308 rexfiuz 15283 gcdcllem1 16438 mreacs 17593 comfeq 17641 catpropd 17644 isnsg2 19097 cntzrec 19277 oppgsubm 19303 opprirred 20370 opprsubrng 20504 opprsubrg 20538 opprdomnb 20662 rmodislmodlem 20892 rmodislmod 20893 islindf4 21805 cpmatmcllem 22674 tgss2 22943 ist1-2 23303 kgencn 23512 ptcnplem 23577 cnmptcom 23634 fbun 23796 cnflf 23958 fclsopn 23970 cnfcf 23998 isclmp 25065 isncvsngp 25117 caucfil 25251 ovolgelb 25449 dyadmax 25567 ftc1a 26012 ulmcau 26372 noetasuplem4 27716 conway 27787 cofcutr 27932 addsprop 27984 onsfi 28364 perpcom 28797 colinearalg 28995 uhgrvd00 29620 pthdlem2lem 29852 frgrwopregbsn 30404 phoeqi 30945 ho02i 31917 hoeq2 31919 adjsym 31921 cnvadj 31980 mddmd2 32397 cdj3lem3b 32528 mgccnv 33092 cvmlift2lem12 35530 elpotr 35995 fvineqsnf1 37665 poimirlem29 37900 heicant 37906 disjimeceqim 39055 ispsubsp2 40122 fsuppind 42948 nla0003 43781 ntrclsiso 44423 ntrneiiso 44447 ntrneik2 44448 ntrneix2 44449 ntrneik3 44452 ntrneix3 44453 ntrneik13 44454 ntrneix13 44455 ntrneik4w 44456 imo72b2 44528 tratrb 44892 hbra2VD 45215 tratrbVD 45216 termopropd 49603 |
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