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| Mirrors > Home > NFE Home > Th. List > anbi12d | GIF version | ||
| Description: Deduction joining two equivalences to form equivalence of conjunctions. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| bi12d.1 | ⊢ (φ → (ψ ↔ χ)) |
| bi12d.2 | ⊢ (φ → (θ ↔ τ)) |
| Ref | Expression |
|---|---|
| anbi12d | ⊢ (φ → ((ψ ∧ θ) ↔ (χ ∧ τ))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi12d.1 | . . 3 ⊢ (φ → (ψ ↔ χ)) | |
| 2 | 1 | anbi1d 685 | . 2 ⊢ (φ → ((ψ ∧ θ) ↔ (χ ∧ θ))) |
| 3 | bi12d.2 | . . 3 ⊢ (φ → (θ ↔ τ)) | |
| 4 | 3 | anbi2d 684 | . 2 ⊢ (φ → ((χ ∧ θ) ↔ (χ ∧ τ))) |
| 5 | 2, 4 | bitrd 244 | 1 ⊢ (φ → ((ψ ∧ θ) ↔ (χ ∧ τ))) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 176 ∧ wa 358 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 177 df-an 360 |
| This theorem is used by: pm4.38 842 3anbi123d 1252 cadbi123d 1383 drsb1 2022 mopick 2266 clelab 2474 cbvreu 2834 cbvrexdva2 2841 cbvrab 2858 gencbvex 2902 rspce 2951 eqvincf 2968 ceqsrexv 2973 elrabf 2994 rexab2 3004 reu2 3025 reu6 3026 rmo4 3030 reu8 3033 reuind 3040 sbcan 3089 sbcang 3090 sbcabel 3124 rmob 3135 cbvreucsf 3201 cbvrabcsf 3202 psseq1 3357 psseq2 3358 ssconb 3400 pssdifcom1 3636 pssdifcom2 3637 2ralunsn 3881 elunii 3897 csbunig 3900 eluniab 3904 eluni1g 4173 opkelcokg 4262 opkelimagekg 4272 dfpw12 4302 sspw1 4336 reiota2 4369 dfnnc2 4396 eladdci 4400 addcid1 4406 peano5 4410 elsuc 4414 addcass 4416 nnsucelr 4429 opkltfing 4450 preaddccan2lem1 4455 preaddccan2 4456 ltfintr 4460 ssfin 4471 ncfinraise 4482 ncfinlower 4484 0ceven 4506 evennn 4507 oddnn 4508 evennnul 4509 oddnnul 4510 sucevenodd 4511 sucoddeven 4512 evenodddisjlem1 4516 eventfin 4518 oddtfin 4519 nnpweq 4524 sfin01 4529 sfindbl 4531 spfininduct 4541 1cvsfin 4543 vfinspsslem1 4551 cbvopab 4631 cbvopab1 4633 cbvopab2 4634 cbvopab1s 4635 cbvopab2v 4637 opelopab2a 4703 setconslem4 4735 dfid3 4769 csbxpg 4814 vtoclr 4817 opeliunxp 4821 opeliunxp2 4823 opbrop 4842 elsnres 4997 dfres2 5003 elxp4 5109 nfunv 5139 fununi 5161 funcnvuni 5162 fneq1 5174 feq1 5211 f1eq1 5254 foeq1 5266 f1oeq1 5282 f1oeq2 5283 f1oeq3 5284 ffoss 5315 fv3 5342 dffn5 5364 fvopab3g 5387 fvopab3ig 5388 inpreima 5410 isoeq1 5483 isoeq4 5486 isoini 5498 f1oiso2 5501 fununiq 5518 cbvoprab1 5568 cbvoprab2 5569 cbvoprab12 5570 ov 5596 ovig 5598 ovg 5602 caovmo 5646 mpt2eq123dv 5664 cbvmpt 5677 cbvmpt2x 5679 ovmpt2x 5713 fmpt2x 5731 trtxp 5782 op1st2nd 5791 txpcofun 5804 fnfullfunlem1 5857 clos1conn 5880 clos1induct 5881 trd 5922 frd 5923 trrd 5926 antird 5929 antid 5930 frds 5936 bren 6031 endisj 6052 enprmapc 6084 mucnc 6132 ce0nnul 6178 ce2 6193 sbthlem2 6205 sbth 6207 lectr 6212 letc 6232 nmembers1lem1 6269 nmembers1lem3 6271 nchoicelem16 6305 nchoicelem17 6306 nchoicelem19 6308 fnfreclem3 6320 fnfrec 6321 |
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