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| Mirrors > Home > MPE Home > Th. List > ifboth | Structured version Visualization version GIF version | ||
| Description: A wff 𝜃 containing a conditional operator is true when both of its cases are true. (Contributed by NM, 3-Sep-2006.) (Revised by Mario Carneiro, 15-Feb-2015.) |
| Ref | Expression |
|---|---|
| ifboth.1 | ⊢ (𝐴 = if(𝜑, 𝐴, 𝐵) → (𝜓 ↔ 𝜃)) |
| ifboth.2 | ⊢ (𝐵 = if(𝜑, 𝐴, 𝐵) → (𝜒 ↔ 𝜃)) |
| Ref | Expression |
|---|---|
| ifboth | ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ifboth.1 | . 2 ⊢ (𝐴 = if(𝜑, 𝐴, 𝐵) → (𝜓 ↔ 𝜃)) | |
| 2 | ifboth.2 | . 2 ⊢ (𝐵 = if(𝜑, 𝐴, 𝐵) → (𝜒 ↔ 𝜃)) | |
| 3 | simpll 767 | . 2 ⊢ (((𝜓 ∧ 𝜒) ∧ 𝜑) → 𝜓) | |
| 4 | simplr 769 | . 2 ⊢ (((𝜓 ∧ 𝜒) ∧ ¬ 𝜑) → 𝜒) | |
| 5 | 1, 2, 3, 4 | ifbothda 4506 | 1 ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 = wceq 1542 ifcif 4467 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-if 4468 |
| This theorem is referenced by: ifcl 4513 keephyp 4539 soltmin 6100 xrmaxlt 13133 xrltmin 13134 xrmaxle 13135 xrlemin 13136 ifle 13149 expmulnbnd 14197 limsupgre 15443 isumless 15810 cvgrat 15848 rpnnen2lem4 16184 ruclem2 16199 sadcaddlem 16426 sadadd3 16430 pcmptdvds 16865 prmreclem5 16891 prmreclem6 16892 pnfnei 23185 mnfnei 23186 xkopt 23620 xmetrtri2 24321 stdbdxmet 24480 stdbdmet 24481 stdbdmopn 24483 xrsxmet 24775 icccmplem2 24789 metdscn 24822 metnrmlem1a 24824 ivthlem2 25419 ovolicc2lem5 25488 ioombl1lem1 25525 ioombl1lem4 25528 ismbfd 25606 mbfi1fseqlem4 25685 mbfi1fseqlem5 25686 itg2const 25707 itg2const2 25708 itg2monolem3 25719 itg2gt0 25727 itg2cnlem1 25728 itg2cnlem2 25729 iblss 25772 itgless 25784 ibladdlem 25787 iblabsr 25797 iblmulc2 25798 bddiblnc 25809 dvferm1lem 25951 dvferm2lem 25953 dvlip2 25962 dgradd2 26233 plydiveu 26264 chtppilim 27438 dchrvmasumiflem1 27464 ostth3 27601 1smat1 33948 poimirlem24 37965 mblfinlem2 37979 itg2addnclem 37992 itg2addnc 37995 itg2gt0cn 37996 ibladdnclem 37997 iblmulc2nc 38006 ftc1anclem5 38018 ftc1anclem8 38021 ftc1anc 38022 |
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