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| Mirrors > Home > ILE Home > Th. List > bi2anan9 | GIF version | ||
| Description: Deduction joining two equivalences to form equivalence of conjunctions. (Contributed by NM, 31-Jul-1995.) |
| Ref | Expression |
|---|---|
| bi2an9.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
| bi2an9.2 | ⊢ (𝜃 → (𝜏 ↔ 𝜂)) |
| Ref | Expression |
|---|---|
| bi2anan9 | ⊢ ((𝜑 ∧ 𝜃) → ((𝜓 ∧ 𝜏) ↔ (𝜒 ∧ 𝜂))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi2an9.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
| 2 | 1 | anbi1d 465 | . 2 ⊢ (𝜑 → ((𝜓 ∧ 𝜏) ↔ (𝜒 ∧ 𝜏))) |
| 3 | bi2an9.2 | . . 3 ⊢ (𝜃 → (𝜏 ↔ 𝜂)) | |
| 4 | 3 | anbi2d 464 | . 2 ⊢ (𝜃 → ((𝜒 ∧ 𝜏) ↔ (𝜒 ∧ 𝜂))) |
| 5 | 2, 4 | sylan9bb 462 | 1 ⊢ ((𝜑 ∧ 𝜃) → ((𝜓 ∧ 𝜏) ↔ (𝜒 ∧ 𝜂))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This theorem depends on definitions: df-bi 117 |
| This theorem is referenced by: bi2anan9r 611 rspc2gv 2936 ralprg 3745 raltpg 3747 prssg 3856 prsspwg 3859 ssprss 3860 opelopab2a 4388 opelxp 4784 eqrel 4844 eqrelrel 4856 brcog 4927 dff13 5947 resoprab2 6158 ovig 6183 dfoprab4f 6400 f1o2ndf1 6437 eroveu 6873 th3qlem1 6884 th3qlem2 6885 th3q 6887 oviec 6888 endisj 7088 exmidapne 7590 dfplpq2 7685 dfmpq2 7686 ordpipqqs 7705 enq0enq 7762 mulnnnq0 7781 ltsrprg 8078 axcnre 8212 axmulgt0 8361 addltmul 9492 ltxr 10127 sumsqeq0 11004 ccat0 11309 mul0inf 11951 dvds2lem 12514 opoe 12606 omoe 12607 opeo 12608 omeo 12609 gcddvds 12684 dfgcd2 12735 pcqmul 13026 xpsfrnel2 13610 eqgval 13976 txbasval 15258 cnmpt12 15278 cnmpt22 15285 lgsquadlem3 16078 lgsquad 16079 2sqlem7 16120 |
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