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Mirrors > Home > MPE Home > Th. List > ifeq2d | Structured version Visualization version GIF version |
Description: Equality deduction for conditional operator. (Contributed by NM, 16-Feb-2005.) |
Ref | Expression |
---|---|
ifeq1d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
Ref | Expression |
---|---|
ifeq2d | ⊢ (𝜑 → if(𝜓, 𝐶, 𝐴) = if(𝜓, 𝐶, 𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ifeq1d.1 | . 2 ⊢ (𝜑 → 𝐴 = 𝐵) | |
2 | ifeq2 4041 | . 2 ⊢ (𝐴 = 𝐵 → if(𝜓, 𝐶, 𝐴) = if(𝜓, 𝐶, 𝐵)) | |
3 | 1, 2 | syl 17 | 1 ⊢ (𝜑 → if(𝜓, 𝐶, 𝐴) = if(𝜓, 𝐶, 𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1475 ifcif 4036 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-rab 2905 df-v 3175 df-un 3545 df-if 4037 |
This theorem is referenced by: ifeq12d 4056 ifbieq2d 4061 ifeq2da 4067 ifcomnan 4087 rdgeq1 7394 cantnflem1d 8468 cantnflem1 8469 rexmul 11973 1arithlem4 15468 ramcl 15571 mplcoe1 19286 mplcoe5 19289 subrgascl 19319 scmatscm 20138 marrepfval 20185 ma1repveval 20196 mulmarep1el 20197 mdetralt2 20234 mdetunilem8 20244 maduval 20263 maducoeval2 20265 madurid 20269 minmar1val0 20272 monmatcollpw 20403 pmatcollpwscmatlem1 20413 monmat2matmon 20448 itg2monolem1 23323 iblmulc2 23403 itgmulc2lem1 23404 bddmulibl 23411 dvtaylp 23928 dchrinvcl 24778 rpvmasum2 25001 padicfval 25105 plymulx 29951 itg2addnclem 32631 itg2addnclem3 32633 itg2addnc 32634 itgmulc2nclem1 32646 hdmap1fval 36104 itgioocnicc 38869 etransclem14 39141 etransclem17 39144 etransclem21 39148 etransclem25 39152 etransclem28 39155 etransclem31 39158 hsphoif 39466 hoidmvval 39467 hsphoival 39469 hoidmvlelem5 39489 hoidmvle 39490 ovnhoi 39493 hspmbllem2 39517 |
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