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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 3366 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3366 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 1850 | . . 3 ⊢ (∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑) ↔ ∀𝑥∀𝑦((𝑦 ∈ 𝐵 ∧ 𝑥 ∈ 𝐴) → 𝜑)) |
| 3 | alcom 2194 | . . 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 |
| Syntax hints: → wi 4 ↔ wb 209 ∧ wa 400 ∀wal 1568 ∈ wcel 2143 ∀wral 3079 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-11 2192 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-ex 1810 df-ral 3080 |
| This theorem is referenced by: rexcom 3294 ralrot3 3296 ralcom13 3297 2reu4lem 4484 ssint 4929 iinrab2 5034 disjxun 5107 reusv3 5376 cnvpo 6288 cnvso 6289 dfpo2 6297 fununi 6611 isocnv2 7329 dfsmo2 8330 tz7.48lem 8424 ixpiin 8918 boxriin 8934 dedekind 11368 rexfiuz 15395 gcdcllem1 16552 mreacs 17709 comfeq 17757 catpropd 17760 isnsg2 19217 cntzrec 19401 oppgsubm 19427 opprirred 20500 opprsubrng 20658 opprsubrg 20692 opprdomnb 20815 rmodislmodlem 21050 rmodislmod 21051 islindf4 21988 cpmatmcllem 22875 tgss2 23144 ist1-2 23504 kgencn 23713 ptcnplem 23778 cnmptcom 23835 fbun 23997 cnflf 24159 fclsopn 24171 cnfcf 24199 isclmp 25256 isncvsngp 25308 caucfil 25442 ovolgelb 25639 dyadmax 25757 ftc1a 26196 ulmcau 26558 noetasuplem4 27900 conway 27972 cofcutr 28117 addsprop 28169 onsfi 28549 perpcom 28993 colinearalg 29260 uhgrvd00 29884 pthdlem2lem 30116 frgrwopregbsn 30668 phoeqi 31209 ho02i 32181 hoeq2 32183 adjsym 32185 cnvadj 32244 mddmd2 32661 cdj3lem3b 32792 mgccnv 33319 cvmlift2lem12 35806 elpotr 36271 nmulcom 36686 fvineqsnf1 38076 poimirlem29 38320 heicant 38326 disjimeceqim 39473 ispsubsp2 40540 fsuppind 43342 nla0003 44171 ntrclsiso 44813 ntrneiiso 44837 ntrneik2 44838 ntrneix2 44839 ntrneik3 44842 ntrneix3 44843 ntrneik13 44844 ntrneix13 44845 ntrneik4w 44846 imo72b2 44918 tratrb 45265 hbra2VD 45588 tratrbVD 45589 termopropd 50042 |
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