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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 6290 cnvso 6291 dfpo2 6299 fununi 6615 isocnv2 7339 dfsmo2 8355 tz7.48lemOLD 8451 ixpiin 8952 boxriin 8968 dedekind 11473 rexfiuz 15515 gcdcllem1 16669 mreacs 17832 comfeq 17880 catpropd 17883 isnsg2 19366 cntzrec 19550 oppgsubm 19576 opprirred 20652 opprsubrng 20811 opprsubrg 20845 opprdomnb 20968 rmodislmodlem 21204 rmodislmod 21205 islindf4 22144 cpmatmcllem 23036 tgss2 23305 ist1-2 23665 kgencn 23875 ptcnplem 23940 cnmptcom 23997 fbun 24159 cnflf 24321 fclsopn 24333 cnfcf 24361 isclmp 25418 isncvsngp 25470 caucfil 25604 ovolgelb 25801 dyadmax 25919 ftc1a 26357 ulmcau 26722 noetasuplem4 28093 conway 28165 cofcutr 28310 addsprop 28362 onsfi 28742 perpcom 29188 colinearalg 29488 uhgrvd00 30115 pthdlem2lem 30353 frgrwopregbsn 30918 phoeqi 31459 ho02i 32431 hoeq2 32433 adjsym 32435 cnvadj 32494 mddmd2 32911 cdj3lem3b 33042 mgccnv 33560 cvmlift2lem12 36079 elpotr 36543 nmulcom 36943 fvineqsnf1 38333 poimirlem29 38567 heicant 38573 disjimeceqim 39736 ispsubsp2 40803 fsuppind 43618 nla0003 44425 ntrclsiso 45066 ntrneiiso 45090 ntrneik2 45091 ntrneix2 45092 ntrneik3 45095 ntrneix3 45096 ntrneik13 45097 ntrneix13 45098 ntrneik4w 45099 imo72b2 45171 tratrb 45518 hbra2VD 45841 tratrbVD 45842 termopropd 50351 |
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