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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 778 | . 2 ⊢ (((𝜓 ∧ 𝜒) ∧ 𝜑) → 𝜓) | |
| 4 | simplr 780 | . 2 ⊢ (((𝜓 ∧ 𝜒) ∧ ¬ 𝜑) → 𝜒) | |
| 5 | 1, 2, 3, 4 | ifbothda 4522 | 1 ⊢ ((𝜓 ∧ 𝜒) → 𝜃) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 = wceq 1563 ifcif 4483 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-if 4484 |
| This theorem is referenced by: ifcl 4529 keephyp 4555 soltmin 6127 xrmaxlt 13198 xrltmin 13199 xrmaxle 13200 xrlemin 13201 ifle 13214 expmulnbnd 14262 limsupgre 15522 isumless 15889 cvgrat 15927 rpnnen2lem4 16263 ruclem2 16278 sadcaddlem 16505 sadadd3 16509 pcmptdvds 16944 prmreclem5 16970 prmreclem6 16971 pnfnei 23338 mnfnei 23339 xkopt 23773 xmetrtri2 24474 stdbdxmet 24633 stdbdmet 24634 stdbdmopn 24636 xrsxmet 24928 icccmplem2 24942 metdscn 24975 metnrmlem1a 24977 ivthlem2 25572 ovolicc2lem5 25641 ioombl1lem1 25678 ioombl1lem4 25681 ismbfd 25759 mbfi1fseqlem4 25838 mbfi1fseqlem5 25839 itg2const 25860 itg2const2 25861 itg2monolem3 25872 itg2gt0 25880 itg2cnlem1 25881 itg2cnlem2 25882 iblss 25925 itgless 25937 ibladdlem 25940 iblabsr 25950 iblmulc2 25951 bddiblnc 25962 dvferm1lem 26104 dvferm2lem 26106 dvlip2 26115 dgradd2 26386 plydiveu 26420 chtppilim 27597 dchrvmasumiflem1 27623 ostth3 27760 1smat1 34111 poimirlem24 38155 mblfinlem2 38169 itg2addnclem 38182 itg2addnc 38185 itg2gt0cn 38186 ibladdnclem 38187 iblmulc2nc 38196 ftc1anclem5 38208 ftc1anclem8 38211 ftc1anc 38212 |
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