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| Mirrors > Home > MPE Home > Th. List > 2ralbii | Structured version Visualization version GIF version | ||
| Description: Inference adding two restricted universal quantifiers to both sides of an equivalence. (Contributed by NM, 1-Aug-2004.) |
| Ref | Expression |
|---|---|
| 2ralbii.1 | ⊢ (𝜑 ↔ 𝜓) |
| Ref | Expression |
|---|---|
| 2ralbii | ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜓) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2ralbii.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | 1 | ralbii 3110 | . 2 ⊢ (∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 𝜓) |
| 3 | 2 | ralbii 3110 | 1 ⊢ (∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑥 ∈ 𝐴 ∀𝑦 ∈ 𝐵 𝜓) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∀wral 3078 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1824 ax-4 1838 |
| This proof depends on definitions: df-bi 210 df-ral 3079 |
| This theorem is used by: 3ralbii 3141 ralnex3 3145 rmo4f 3697 2reu4lem 4483 cnvso 6289 fununi 6611 dff14a 7268 isocnv2 7329 f1opr 7468 sorpss 7727 xpord3inddlem 8148 tpossym 8252 dford2 9587 isffth2 17981 ispos2 18377 issubmgm 18766 issubm 18867 cntzrec 19412 oppgsubm 19438 opprirred 20511 opprsubrng 20669 rhmimasubrng 20676 cntzsubrng 20677 opprsubrg 20703 isdomn5 20820 isdomn3 20824 prmidl0 21489 gsummatr01lem3 22825 gsummatr01 22827 isbasis2g 23116 ist0-3 23513 isfbas2 24003 isclmp 25267 addsproplem4 28176 addsproplem6 28178 addsprop 28180 negsproplem4 28235 negsproplem6 28237 negsprop 28239 mulsprop 28334 dfadj2 32248 adjval2 32254 cnlnadjeui 32440 adjbdln 32446 isarchi 33511 ply1dg3rt0irred 33883 dff15 35481 iccllysconn 35750 dfso3 36220 elpotr 36279 dfon2 36290 idinxpss 38995 inxpssidinxp 38999 idinxpssinxp 39000 dfdisjALTV5a 39480 dfeldisj5 39490 dfeldisj5a 39491 isltrn2N 40922 hashnexinj 42923 fphpd 43571 fiinfi 44327 ntrk1k3eqk13 44804 ordelordALT 45274 dfac5prim 45727 disjinfi 45938 isthinc2 50226 isthinc3 50227 |
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