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| Mirrors > Home > ILE Home > Th. List > 3eqtr2d | GIF version | ||
| Description: A deduction from three chained equalities. (Contributed by NM, 4-Aug-2006.) |
| Ref | Expression |
|---|---|
| 3eqtr2d.1 | ⊢ (𝜑 → 𝐴 = 𝐵) |
| 3eqtr2d.2 | ⊢ (𝜑 → 𝐶 = 𝐵) |
| 3eqtr2d.3 | ⊢ (𝜑 → 𝐶 = 𝐷) |
| Ref | Expression |
|---|---|
| 3eqtr2d | ⊢ (𝜑 → 𝐴 = 𝐷) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3eqtr2d.1 | . . 3 ⊢ (𝜑 → 𝐴 = 𝐵) | |
| 2 | 3eqtr2d.2 | . . 3 ⊢ (𝜑 → 𝐶 = 𝐵) | |
| 3 | 1, 2 | eqtr4d 2274 | . 2 ⊢ (𝜑 → 𝐴 = 𝐶) |
| 4 | 3eqtr2d.3 | . 2 ⊢ (𝜑 → 𝐶 = 𝐷) | |
| 5 | 3, 4 | eqtrd 2271 | 1 ⊢ (𝜑 → 𝐴 = 𝐷) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1500 ax-gen 1502 ax-4 1563 ax-17 1579 ax-ext 2220 |
| This proof depends on definitions: df-bi 117 df-cleq 2231 |
| This theorem is used by: fmptapd 5906 rdgisucinc 6656 ctm 7450 mulidnq 7757 ltrnqg 7788 recexprlem1ssl 8001 recexprlem1ssu 8002 ltmprr 8010 mulcmpblnrlemg 8108 caucvgsrlemoffcau 8166 negsub 8576 neg2sub 8588 divmuleqap 9050 divneg2ap 9069 qapne 10049 seqvalcd 10913 binom2 11103 bcpasc 11220 hashf1lem2 11302 cats2catd 11557 crim 11639 remullem 11652 max0addsup 12002 summodclem2a 12167 isum1p 12278 geo2sum 12300 cvgratz 12318 efi4p 12503 tanaddap 12525 addcos 12532 cos2tsin 12537 demoivreALT 12560 omeo 12684 sqgcd 12825 eulerthlemth 13033 pythagtriplem16 13081 fldivp1 13150 pockthlem 13158 4sqlem10 13189 ballotfilemscr 13314 ballotfilemfrci 13323 ballotfilemfrceq 13324 gzsumval2 13767 grpinvid2 13911 imasgrp2 13966 mulgaddcomlem 14001 mulgmodid 14017 cntzsgrpcl 14161 cntzsubm 14164 ablsubsub 14206 ablsubsub4 14207 gzsumsnfd 14231 opprunitd 14501 lmodfopne 14747 mpl0fi 15184 mplnegfi 15187 txrest 15468 limccnpcntop 15867 dvrecap 15905 dvply1 15957 cosq34lt1 16043 log2tlbndlog2 16181 birthdaylem2 16187 wilthlem1 16193 mersenne 16258 lgseisenlem1 16355 lgsquadlem1 16362 lgsquadlem2 16363 lgsquadlem3 16364 lgsquad2lem1 16366 2lgslem1 16376 qdiff 17265 |
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