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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 3112 | . 2 ⊢ (∀𝑦 ∈ 𝐵 𝜑 ↔ ∀𝑦 ∈ 𝐵 𝜓) |
| 3 | 2 | ralbii 3112 | 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 3080 |
| 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 3081 |
| This theorem is used by: 3ralbii 3143 ralnex3 3147 rmo4f 3696 2reu4lem 4482 cnvso 6315 fununi 6645 dff14a 7305 dff15 7307 isocnv2 7370 f1opr 7507 sorpss 7776 xpord3inddlem 8208 tpossym 8313 dford2 9658 isffth2 18143 ispos2 18539 issubmgm 18941 issubm 19048 cntzrec 19601 oppgsubm 19627 dfring3 20569 opprirred 20703 opprsubrng 20862 rhmimasubrng 20869 cntzsubrng 20870 opprsubrg 20896 isdomn5 21013 isdomn3 21017 prmidl0 21685 gsummatr01lem3 23027 gsummatr01 23029 isbasis2g 23321 ist0-3 23718 isfbas2 24209 isclmp 25473 addsproplem4 28415 addsproplem6 28417 addsprop 28419 negsproplem4 28474 negsproplem6 28476 negsprop 28478 mulsprop 28573 dfadj2 32544 adjval2 32550 cnlnadjeui 32736 adjbdln 32742 isarchi 33842 ply1dg3rt0irred 34219 iccllysconn 36223 dfso3 36700 elpotr 36758 dfon2 36769 idinxpss 39516 inxpssidinxp 39520 idinxpssinxp 39521 dfdisjALTV5a 40001 dfeldisj5 40011 dfeldisj5a 40012 isltrn2N 41443 hashnexinj 43444 fphpd 44089 fiinfi 44835 ntrk1k3eqk13 45311 ordelordALT 45780 dfac5prim 46244 disjinfi 46480 isthinc2 50886 isthinc3 50887 |
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