| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > ifbieq1d | GIF version | ||
| Description: Equivalence/equality deduction for conditional operators. (Contributed by JJ, 25-Sep-2018.) |
| Ref | Expression |
|---|---|
| ifbieq1d.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
| ifbieq1d.2 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| Ref | Expression |
|---|---|
| ifbieq1d | ⊢ (𝜑 → if(𝜓, 𝐴, 𝐶) = if(𝜒, 𝐵, 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ifbieq1d.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
| 2 | 1 | ifbid 3662 | . 2 ⊢ (𝜑 → if(𝜓, 𝐴, 𝐶) = if(𝜒, 𝐴, 𝐶)) |
| 3 | ifbieq1d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | ifeq1d 3658 | . 2 ⊢ (𝜑 → if(𝜒, 𝐴, 𝐶) = if(𝜒, 𝐵, 𝐶)) |
| 5 | 2, 4 | eqtrd 2271 | 1 ⊢ (𝜑 → if(𝜓, 𝐴, 𝐶) = if(𝜒, 𝐵, 𝐶)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1402 ifcif 3638 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 623 ax-in2 624 ax-io 721 ax-5 1500 ax-7 1501 ax-gen 1502 ax-ie1 1546 ax-ie2 1547 ax-8 1557 ax-10 1558 ax-11 1559 ax-i12 1560 ax-bndl 1562 ax-4 1563 ax-17 1579 ax-i9 1583 ax-ial 1587 ax-i5r 1588 ax-ext 2220 |
| This theorem depends on definitions: df-bi 117 df-tru 1405 df-nf 1514 df-sb 1816 df-clab 2225 df-cleq 2231 df-clel 2234 df-nfc 2381 df-rab 2537 df-v 2823 df-un 3224 df-if 3639 |
| This theorem is referenced by: ctssdclemn0 7444 ctssdc 7447 enumctlemm 7448 iseqf1olemfvp 10930 seq3f1olemqsum 10933 seq3f1oleml 10936 seq3f1o 10937 bcval 11170 swrdval 11403 sumrbdclem 12127 summodclem3 12130 summodclem2a 12131 summodc 12133 zsumdc 12134 fsum3 12137 isumss 12141 isumss2 12143 fsum3cvg2 12144 fsum3ser 12147 fsumcl2lem 12148 fsumadd 12156 sumsnf 12159 fsummulc2 12198 isumlessdc 12246 cbvprod 12308 prodrbdclem 12321 prodmodclem3 12325 prodmodclem2a 12326 prodmodc 12328 zproddc 12329 fprodseq 12333 fprodntrivap 12334 prodssdc 12339 fprodmul 12341 prodsnf 12342 pcmpt 13105 pcmptdvds 13107 ballotfilemsval 13235 ballotfilemieq 13243 ballotfi 13265 elply2 15819 lgsval 16106 lgsfvalg 16107 lgsdir 16137 lgsdilem2 16138 lgsdi 16139 lgsne0 16140 |
| Copyright terms: Public domain | W3C validator |