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| Mirrors > Home > ILE Home > Th. List > 3imtr4d | GIF version | ||
| Description: More general version of 3imtr4i 201. Useful for converting conditional definitions in a formula. (Contributed by NM, 26-Oct-1995.) |
| Ref | Expression |
|---|---|
| 3imtr4d.1 | ⊢ (𝜑 → (𝜓 → 𝜒)) |
| 3imtr4d.2 | ⊢ (𝜑 → (𝜃 ↔ 𝜓)) |
| 3imtr4d.3 | ⊢ (𝜑 → (𝜏 ↔ 𝜒)) |
| Ref | Expression |
|---|---|
| 3imtr4d | ⊢ (𝜑 → (𝜃 → 𝜏)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3imtr4d.2 | . 2 ⊢ (𝜑 → (𝜃 ↔ 𝜓)) | |
| 2 | 3imtr4d.1 | . . 3 ⊢ (𝜑 → (𝜓 → 𝜒)) | |
| 3 | 3imtr4d.3 | . . 3 ⊢ (𝜑 → (𝜏 ↔ 𝜒)) | |
| 4 | 2, 3 | sylibrd 169 | . 2 ⊢ (𝜑 → (𝜓 → 𝜏)) |
| 5 | 1, 4 | sylbid 150 | 1 ⊢ (𝜑 → (𝜃 → 𝜏)) |
| 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: onsucelsucr 4655 unielrel 5315 ovmpos 6212 caofrss 6334 caoftrn 6335 f1o2ndf1 6464 nnaord 6782 nnmord 6790 oviec 6915 pmss12g 6956 fiss 7311 pm54.43 7536 ltsopi 7687 lttrsr 8129 ltsosr 8131 aptisr 8146 mulextsr1 8148 axpre-mulext 8255 axltwlin 8393 axlttrn 8394 axltadd 8395 axmulgt0 8397 letr 8408 eqord1 8812 remulext1 8929 mulext1 8942 recexap 8983 prodge0 9186 lt2msq 9218 nnge1 9329 zltp1le 9703 uzss 9952 eluzp1m1 9955 xrletr 10220 ixxssixx 10314 zesq 11109 expcanlem 11167 expcan 11168 nn0opthd 11174 wrdind 11508 wrd2ind 11509 pfxccatin12lem3 11518 maxleast 11994 climshftlemg 12084 dvds1lem 12585 bezoutlemzz 12795 algcvg 12842 eucalgcvga 12852 rpexp12i 12950 crth 13022 pc2dvds 13129 pcmpt 13142 prmpwdvds 13154 1arith 13166 ercpbl 13701 insubm 13841 subginv 14033 rngpropd 14303 dvdsunit 14468 subrgdvds 14592 tgss 15213 neipsm 15304 ssrest 15332 cos11 16004 lgsdir2lem4 16248 gausslemma2dlem1a 16275 m1lgs 16302 |
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