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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 3363 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3363 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 1853 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2196 | . . 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 3199 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3199 | . 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 1568 ∈ wcel 2145 ∀wral 3077 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-11 2194 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-ral 3078 |
| This theorem is used by: rexcom 3292 ralrot3 3294 ralcom13 3295 2reu4lem 4479 ssint 4924 iinrab2 5028 disjxun 5101 reusv3 5367 cnvpo 6291 cnvso 6292 dfpo2 6300 fununi 6616 isocnv2 7340 dfsmo2 8356 tz7.48lemOLD 8452 ixpiin 8953 boxriin 8969 dedekind 11474 rexfiuz 15516 gcdcllem1 16670 mreacs 17833 comfeq 17881 catpropd 17884 isnsg2 19367 cntzrec 19551 oppgsubm 19577 opprirred 20653 opprsubrng 20812 opprsubrg 20846 opprdomnb 20969 rmodislmodlem 21205 rmodislmod 21206 islindf4 22145 cpmatmcllem 23037 tgss2 23306 ist1-2 23666 kgencn 23876 ptcnplem 23941 cnmptcom 23998 fbun 24160 cnflf 24322 fclsopn 24334 cnfcf 24362 isclmp 25419 isncvsngp 25471 caucfil 25605 ovolgelb 25802 dyadmax 25920 ftc1a 26358 ulmcau 26723 noetasuplem4 28094 conway 28166 cofcutr 28311 addsprop 28363 onsfi 28743 perpcom 29189 colinearalg 29489 uhgrvd00 30116 pthdlem2lem 30354 frgrwopregbsn 30919 phoeqi 31460 ho02i 32432 hoeq2 32434 adjsym 32436 cnvadj 32495 mddmd2 32912 cdj3lem3b 33043 mgccnv 33561 cvmlift2lem12 36080 elpotr 36544 nmulcom 36944 fvineqsnf1 38335 poimirlem29 38569 heicant 38575 disjimeceqim 39738 ispsubsp2 40805 fsuppind 43620 nla0003 44427 ntrclsiso 45068 ntrneiiso 45092 ntrneik2 45093 ntrneix2 45094 ntrneik3 45097 ntrneix3 45098 ntrneik13 45099 ntrneix13 45100 ntrneik4w 45101 imo72b2 45173 tratrb 45520 hbra2VD 45843 tratrbVD 45844 termopropd 50353 |
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