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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 3373 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3373 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 469 | . . . 4 ⊢ (((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) | |
| 2 | 1 | 2albii 1847 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2200 | . . 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 3207 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3207 | . 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 |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∀wal 1565 ∈ wcel 2149 ∀wral 3085 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-11 2198 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1807 df-ral 3086 |
| This theorem is referenced by: rexcom 3300 ralrot3 3302 ralcom13 3303 2reu4lem 4489 ssint 4933 iinrab2 5038 disjxun 5111 reusv3 5377 cnvpo 6289 cnvso 6290 dfpo2 6298 fununi 6612 isocnv2 7330 dfsmo2 8334 tz7.48lem 8428 ixpiin 8922 boxriin 8938 dedekind 11373 rexfiuz 15399 gcdcllem1 16557 mreacs 17714 comfeq 17762 catpropd 17765 isnsg2 19222 cntzrec 19406 oppgsubm 19432 opprirred 20504 opprsubrng 20644 opprsubrg 20678 opprdomnb 20801 rmodislmodlem 21028 rmodislmod 21029 islindf4 21957 cpmatmcllem 22844 tgss2 23113 ist1-2 23473 kgencn 23682 ptcnplem 23747 cnmptcom 23804 fbun 23966 cnflf 24128 fclsopn 24140 cnfcf 24168 isclmp 25225 isncvsngp 25277 caucfil 25411 ovolgelb 25608 dyadmax 25726 ftc1a 26165 ulmcau 26524 noetasuplem4 27866 conway 27938 cofcutr 28083 addsprop 28135 onsfi 28515 perpcom 28952 colinearalg 29201 uhgrvd00 29825 pthdlem2lem 30057 frgrwopregbsn 30609 phoeqi 31150 ho02i 32122 hoeq2 32124 adjsym 32126 cnvadj 32185 mddmd2 32602 cdj3lem3b 32733 mgccnv 33260 cvmlift2lem12 35705 elpotr 36170 nmulcom 36585 fvineqsnf1 37944 poimirlem29 38188 heicant 38194 disjimeceqim 39343 ispsubsp2 40410 fsuppind 43214 nla0003 44043 ntrclsiso 44685 ntrneiiso 44709 ntrneik2 44710 ntrneix2 44711 ntrneik3 44714 ntrneix3 44715 ntrneik13 44716 ntrneix13 44717 ntrneik4w 44718 imo72b2 44790 tratrb 45137 hbra2VD 45460 tratrbVD 45461 termopropd 49907 |
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