| 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 3625 | . 2 ⊢ (𝜑 → if(𝜓, 𝐴, 𝐶) = if(𝜒, 𝐴, 𝐶)) |
| 3 | ifbieq1d.2 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 4 | 3 | ifeq1d 3621 | . 2 ⊢ (𝜑 → if(𝜒, 𝐴, 𝐶) = if(𝜒, 𝐵, 𝐶)) |
| 5 | 2, 4 | eqtrd 2262 | 1 ⊢ (𝜑 → if(𝜓, 𝐴, 𝐶) = if(𝜒, 𝐵, 𝐶)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ↔ wb 105 = wceq 1395 ifcif 3603 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-rab 2517 df-v 2802 df-un 3202 df-if 3604 |
| This theorem is referenced by: ctssdclemn0 7303 ctssdc 7306 enumctlemm 7307 iseqf1olemfvp 10765 seq3f1olemqsum 10768 seq3f1oleml 10771 seq3f1o 10772 bcval 11004 swrdval 11222 sumrbdclem 11931 summodclem3 11934 summodclem2a 11935 summodc 11937 zsumdc 11938 fsum3 11941 isumss 11945 isumss2 11947 fsum3cvg2 11948 fsum3ser 11951 fsumcl2lem 11952 fsumadd 11960 sumsnf 11963 fsummulc2 12002 isumlessdc 12050 cbvprod 12112 prodrbdclem 12125 prodmodclem3 12129 prodmodclem2a 12130 prodmodc 12132 zproddc 12133 fprodseq 12137 fprodntrivap 12138 prodssdc 12143 fprodmul 12145 prodsnf 12146 pcmpt 12909 pcmptdvds 12911 elply2 15452 lgsval 15726 lgsfvalg 15727 lgsdir 15757 lgsdilem2 15758 lgsdi 15759 lgsne0 15760 |
| Copyright terms: Public domain | W3C validator |