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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 3109 | . 2 ⊢ (∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 𝜓) |
| 3 | 2 | ralbii 3109 | 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 3077 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 |
| This proof depends on definitions: df-bi 210 df-ral 3078 |
| This theorem is used by: 3ralbii 3140 ralnex3 3144 rmo4f 3693 2reu4lem 4479 cnvso 6290 fununi 6613 dff14a 7272 dff15 7274 isocnv2 7337 f1opr 7474 sorpss 7742 xpord3inddlem 8164 tpossym 8268 dford2 9614 isffth2 18086 ispos2 18482 issubmgm 18884 issubm 18991 cntzrec 19543 oppgsubm 19569 dfring3 20511 opprirred 20645 opprsubrng 20804 rhmimasubrng 20811 cntzsubrng 20812 opprsubrg 20838 isdomn5 20955 isdomn3 20959 prmidl0 21627 gsummatr01lem3 22965 gsummatr01 22967 isbasis2g 23259 ist0-3 23656 isfbas2 24147 isclmp 25411 addsproplem4 28351 addsproplem6 28353 addsprop 28355 negsproplem4 28410 negsproplem6 28412 negsprop 28414 mulsprop 28509 dfadj2 32480 adjval2 32486 cnlnadjeui 32672 adjbdln 32678 isarchi 33736 ply1dg3rt0irred 34109 iccllysconn 35994 dfso3 36464 elpotr 36523 dfon2 36534 idinxpss 39230 inxpssidinxp 39234 idinxpssinxp 39235 dfdisjALTV5a 39715 dfeldisj5 39725 dfeldisj5a 39726 isltrn2N 41157 hashnexinj 43158 fphpd 43802 fiinfi 44558 ntrk1k3eqk13 45035 ordelordALT 45505 dfac5prim 45958 disjinfi 46176 isthinc2 50497 isthinc3 50498 |
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