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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 3368 for a version without disjoint variable condition on 𝑥, 𝑦. This theorem should be used in place of ralcom2 3368 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 2197 | . . 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 3203 | . 2 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥∀𝑦((𝑥 ∈ 𝐴 ∧ 𝑦 ∈ 𝐵) → 𝜑)) | |
| 6 | r2al 3203 | . 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 2146 ∀wral 3081 |
| 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 2195 |
| This proof depends on definitions: df-bi 210 df-an 402 df-ex 1813 df-ral 3082 |
| This theorem is used by: rexcom 3296 ralrot3 3298 ralcom13 3299 2reu4lem 4486 ssint 4931 iinrab2 5036 disjxun 5109 reusv3 5378 cnvpo 6292 cnvso 6293 dfpo2 6301 fununi 6615 isocnv2 7338 dfsmo2 8340 tz7.48lem 8434 ixpiin 8928 boxriin 8944 dedekind 11390 rexfiuz 15425 gcdcllem1 16581 mreacs 17738 comfeq 17786 catpropd 17789 isnsg2 19268 cntzrec 19452 oppgsubm 19478 opprirred 20552 opprsubrng 20710 opprsubrg 20744 opprdomnb 20867 rmodislmodlem 21102 rmodislmod 21103 islindf4 22040 cpmatmcllem 22927 tgss2 23196 ist1-2 23556 kgencn 23766 ptcnplem 23831 cnmptcom 23888 fbun 24050 cnflf 24212 fclsopn 24224 cnfcf 24252 isclmp 25309 isncvsngp 25361 caucfil 25495 ovolgelb 25692 dyadmax 25810 ftc1a 26249 ulmcau 26611 noetasuplem4 27953 conway 28025 cofcutr 28170 addsprop 28222 onsfi 28602 perpcom 29046 colinearalg 29317 uhgrvd00 29944 pthdlem2lem 30182 frgrwopregbsn 30741 phoeqi 31282 ho02i 32254 hoeq2 32256 adjsym 32258 cnvadj 32317 mddmd2 32734 cdj3lem3b 32865 mgccnv 33385 cvmlift2lem12 35845 elpotr 36310 nmulcom 36725 fvineqsnf1 38115 poimirlem29 38359 heicant 38365 disjimeceqim 39513 ispsubsp2 40580 fsuppind 43382 nla0003 44211 ntrclsiso 44853 ntrneiiso 44877 ntrneik2 44878 ntrneix2 44879 ntrneik3 44882 ntrneix3 44883 ntrneik13 44884 ntrneix13 44885 ntrneik4w 44886 imo72b2 44958 tratrb 45305 hbra2VD 45628 tratrbVD 45629 termopropd 50081 |
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