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Mirrors > Home > ILE Home > Th. List > 3bitr4d | GIF version |
Description: Deduction from transitivity of biconditional. Useful for converting conditional definitions in a formula. (Contributed by NM, 18-Oct-1995.) |
Ref | Expression |
---|---|
3bitr4d.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
3bitr4d.2 | ⊢ (𝜑 → (𝜃 ↔ 𝜓)) |
3bitr4d.3 | ⊢ (𝜑 → (𝜏 ↔ 𝜒)) |
Ref | Expression |
---|---|
3bitr4d | ⊢ (𝜑 → (𝜃 ↔ 𝜏)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 3bitr4d.2 | . 2 ⊢ (𝜑 → (𝜃 ↔ 𝜓)) | |
2 | 3bitr4d.1 | . . 3 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
3 | 3bitr4d.3 | . . 3 ⊢ (𝜑 → (𝜏 ↔ 𝜒)) | |
4 | 2, 3 | bitr4d 190 | . 2 ⊢ (𝜑 → (𝜓 ↔ 𝜏)) |
5 | 1, 4 | bitrd 187 | 1 ⊢ (𝜑 → (𝜃 ↔ 𝜏)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 ↔ wb 104 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: dfbi3dc 1386 xordidc 1388 19.32dc 1666 r19.32vdc 2613 opbrop 4677 fvopab3g 5553 respreima 5607 fmptco 5645 cocan1 5749 cocan2 5750 brtposg 6213 nnmword 6477 swoer 6520 erth 6536 brecop 6582 ecopovsymg 6591 xpdom2 6788 ctssdccl 7067 omniwomnimkv 7122 pitric 7253 ltexpi 7269 ltapig 7270 ltmpig 7271 ltanqg 7332 ltmnqg 7333 enq0breq 7368 genpassl 7456 genpassu 7457 1idprl 7522 1idpru 7523 caucvgprlemcanl 7576 ltasrg 7702 prsrlt 7719 caucvgsrlemoffcau 7730 ltpsrprg 7735 map2psrprg 7737 axpre-ltadd 7818 subsub23 8094 leadd1 8319 lemul1 8482 reapmul1lem 8483 reapmul1 8484 reapadd1 8485 apsym 8495 apadd1 8497 apti 8511 apcon4bid 8513 lediv1 8755 lt2mul2div 8765 lerec 8770 ltdiv2 8773 lediv2 8777 le2msq 8787 avgle1 9088 avgle2 9089 nn01to3 9546 qapne 9568 cnref1o 9579 xleneg 9764 xsubge0 9808 xleaddadd 9814 iooneg 9915 iccneg 9916 iccshftr 9921 iccshftl 9923 iccdil 9925 icccntr 9927 fzsplit2 9975 fzaddel 9984 fzrev 10009 elfzo 10074 fzon 10091 elfzom1b 10154 ioo0 10185 ico0 10187 ioc0 10188 flqlt 10208 negqmod0 10256 frec2uzled 10354 expeq0 10476 nn0leexp2 10613 nn0opthlem1d 10622 leisorel 10736 cjreb 10794 ltmininf 11162 minclpr 11164 xrmaxlesup 11186 xrltmininf 11197 xrminltinf 11199 tanaddaplem 11665 nndivdvds 11722 moddvds 11725 modmulconst 11749 oddm1even 11797 ltoddhalfle 11815 dvdssq 11949 phiprmpw 12131 eulerthlemh 12140 odzdvds 12154 pc2dvds 12238 cnrest2 12777 cnptoprest 12780 cnptoprest2 12781 lmss 12787 lmff 12790 txlm 12820 ismet2 12895 blres 12975 xmetec 12978 bdbl 13044 metrest 13047 cnbl0 13075 cnblcld 13076 reopnap 13079 bl2ioo 13083 limcdifap 13172 efle 13238 reapef 13240 logleb 13337 logrpap0b 13338 cxplt 13377 cxple 13378 rpcxple2 13379 rpcxplt2 13380 cxplt3 13381 cxple3 13382 apcxp2 13399 logbleb 13420 logblt 13421 iooref1o 13747 |
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