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| Mirrors > Home > ILE Home > Th. List > biimtrrid | GIF version | ||
| Description: A mixed syllogism inference from a nested implication and a biconditional. (Contributed by NM, 5-Aug-1993.) |
| Ref | Expression |
|---|---|
| biimtrrid.1 | ⊢ (𝜓 ↔ 𝜑) |
| biimtrrid.2 | ⊢ (𝜒 → (𝜓 → 𝜃)) |
| Ref | Expression |
|---|---|
| biimtrrid | ⊢ (𝜒 → (𝜑 → 𝜃)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | biimtrrid.1 | . . 3 ⊢ (𝜓 ↔ 𝜑) | |
| 2 | 1 | biimpri 133 | . 2 ⊢ (𝜑 → 𝜓) |
| 3 | biimtrrid.2 | . 2 ⊢ (𝜒 → (𝜓 → 𝜃)) | |
| 4 | 2, 3 | syl5 32 | 1 ⊢ (𝜒 → (𝜑 → 𝜃)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 105 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 |
| This theorem is used by: 3imtr3g 204 19.37-1 1726 mo3h 2140 necon1bidc 2472 necon4aidc 2488 r19.30dc 2698 ceqex 2953 ssdisj 3581 ralidm 3628 exmid1dc 4339 rexxfrd 4611 sucprcreg 4698 imain 5466 f0rn0 5590 funopfv 5743 mpteqb 5799 funfvima 5953 fliftfun 6005 fvdifsuppst 6488 suppssrst 6505 suppssrgst 6506 iinerm 6886 eroveu 6905 th3qlem1 6916 updjudhf 7425 elni2 7687 genpdisj 7896 lttri3 8411 seqf1og 10978 nn0ltexp2 11168 zfz1iso 11314 ccatalpha 11402 cau3lem 11902 maxleast 12001 rexanre 12008 climcau 12137 summodc 12174 mertenslem2 12327 prodmodclem2 12368 prodmodc 12369 fprodseq 12374 bitsfzolem 12745 bitsfzo 12746 divgcdcoprmex 12904 prmind2 12922 sqrtrirr 13013 pcqmul 13110 pcxcl 13118 pcadd 13147 mul4sq 13201 prmlem1a 13249 issubg2m 14050 dvdsrtr 14516 unitgrp 14531 subrgintm 14659 islssm 14802 znidom 15100 opnneiid 15407 txuni2 15499 txbas 15501 txbasval 15510 txlm 15522 blin2 15675 tgqioo 15798 plyadd 15994 plymul 15995 ppiublem1 16308 lgsquad2lem2 16423 2sqlem5 16460 uhgr2edg 16669 uspgr2wlkeq 16828 bj-charfunr 17058 |
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