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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 4337 rexxfrd 4609 sucprcreg 4696 imain 5463 f0rn0 5587 funopfv 5740 mpteqb 5796 funfvima 5950 fliftfun 6002 fvdifsuppst 6484 suppssrst 6501 suppssrgst 6502 iinerm 6881 eroveu 6900 th3qlem1 6911 updjudhf 7419 elni2 7681 genpdisj 7890 lttri3 8405 seqf1og 10958 nn0ltexp2 11147 zfz1iso 11293 ccatalpha 11381 cau3lem 11880 maxleast 11979 rexanre 11986 climcau 12113 summodc 12150 mertenslem2 12303 prodmodclem2 12344 prodmodc 12345 fprodseq 12350 bitsfzolem 12721 bitsfzo 12722 divgcdcoprmex 12880 prmind2 12898 pcqmul 13082 pcxcl 13090 pcadd 13119 mul4sq 13173 issubg2m 13992 dvdsrtr 14408 unitgrp 14423 subrgintm 14551 islssm 14694 znidom 14992 opnneiid 15265 txuni2 15357 txbas 15359 txbasval 15368 txlm 15380 blin2 15533 tgqioo 15656 plyadd 15852 plymul 15853 lgsquad2lem2 16201 2sqlem5 16238 uhgr2edg 16447 uspgr2wlkeq 16606 bj-charfunr 16836 |
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