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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 3362 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3362 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 3198 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3198 | . 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 3076 |
| 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 3077 |
| This theorem is used by: rexcom 3291 ralrot3 3293 ralcom13 3294 2reu4lem 4479 ssint 4924 iinrab2 5028 disjxun 5101 reusv3 5370 cnvpo 6285 cnvso 6286 dfpo2 6294 fununi 6609 isocnv2 7333 dfsmo2 8337 tz7.48lem 8431 ixpiin 8932 boxriin 8948 dedekind 11398 rexfiuz 15436 gcdcllem1 16590 mreacs 17747 comfeq 17795 catpropd 17798 isnsg2 19280 cntzrec 19464 oppgsubm 19490 opprirred 20564 opprsubrng 20722 opprsubrg 20756 opprdomnb 20879 rmodislmodlem 21114 rmodislmod 21115 islindf4 22052 cpmatmcllem 22944 tgss2 23213 ist1-2 23573 kgencn 23783 ptcnplem 23848 cnmptcom 23905 fbun 24067 cnflf 24229 fclsopn 24241 cnfcf 24269 isclmp 25326 isncvsngp 25378 caucfil 25512 ovolgelb 25709 dyadmax 25827 ftc1a 26265 ulmcau 26632 noetasuplem4 27973 conway 28045 cofcutr 28190 addsprop 28242 onsfi 28622 perpcom 29068 colinearalg 29368 uhgrvd00 29995 pthdlem2lem 30233 frgrwopregbsn 30798 phoeqi 31339 ho02i 32311 hoeq2 32313 adjsym 32315 cnvadj 32374 mddmd2 32791 cdj3lem3b 32922 mgccnv 33440 cvmlift2lem12 35894 elpotr 36359 nmulcom 36775 fvineqsnf1 38165 poimirlem29 38399 heicant 38405 disjimeceqim 39553 ispsubsp2 40620 fsuppind 43437 nla0003 44266 ntrclsiso 44908 ntrneiiso 44932 ntrneik2 44933 ntrneix2 44934 ntrneik3 44937 ntrneix3 44938 ntrneik13 44939 ntrneix13 44940 ntrneik4w 44941 imo72b2 45013 tratrb 45360 hbra2VD 45683 tratrbVD 45684 termopropd 50171 |
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