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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 3345 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3345 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 1821 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2164 | . . 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 3170 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3170 | . 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 1539 ∈ wcel 2113 ∀wral 3049 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-11 2162 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-ex 1781 df-ral 3050 |
| This theorem is referenced by: rexcom 3263 ralrot3 3265 ralcom13 3266 2reu4lem 4474 ssint 4917 iinrab2 5023 disjxun 5094 reusv3 5348 cnvpo 6243 cnvso 6244 dfpo2 6252 fununi 6565 isocnv2 7275 dfsmo2 8277 tz7.48lem 8370 ixpiin 8860 boxriin 8876 dedekind 11294 rexfiuz 15269 gcdcllem1 16424 mreacs 17579 comfeq 17627 catpropd 17630 isnsg2 19083 cntzrec 19263 oppgsubm 19289 opprirred 20356 opprsubrng 20490 opprsubrg 20524 opprdomnb 20648 rmodislmodlem 20878 rmodislmod 20879 islindf4 21791 cpmatmcllem 22660 tgss2 22929 ist1-2 23289 kgencn 23498 ptcnplem 23563 cnmptcom 23620 fbun 23782 cnflf 23944 fclsopn 23956 cnfcf 23984 isclmp 25051 isncvsngp 25103 caucfil 25237 ovolgelb 25435 dyadmax 25553 ftc1a 25998 ulmcau 26358 noetasuplem4 27702 conway 27767 cofcutr 27895 addsprop 27946 onsfi 28316 perpcom 28734 colinearalg 28932 uhgrvd00 29557 pthdlem2lem 29789 frgrwopregbsn 30341 phoeqi 30881 ho02i 31853 hoeq2 31855 adjsym 31857 cnvadj 31916 mddmd2 32333 cdj3lem3b 32464 mgccnv 33030 cvmlift2lem12 35457 elpotr 35922 fvineqsnf1 37554 poimirlem29 37789 heicant 37795 ispsubsp2 39945 fsuppind 42775 nla0003 43608 ntrclsiso 44250 ntrneiiso 44274 ntrneik2 44275 ntrneix2 44276 ntrneik3 44279 ntrneix3 44280 ntrneik13 44281 ntrneix13 44282 ntrneik4w 44283 imo72b2 44355 tratrb 44719 hbra2VD 45042 tratrbVD 45043 termopropd 49431 |
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