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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 5909 rdgisucinc 6660 ctm 7455 mulidnq 7762 ltrnqg 7793 recexprlem1ssl 8006 recexprlem1ssu 8007 ltmprr 8015 mulcmpblnrlemg 8113 caucvgsrlemoffcau 8171 negsub 8581 neg2sub 8593 divmuleqap 9055 divneg2ap 9074 qapne 10055 seqvalcd 10919 binom2 11109 bcpasc 11226 hashf1lem2 11308 cats2catd 11563 crim 11645 remullem 11658 max0addsup 12008 summodclem2a 12173 isum1p 12284 geo2sum 12306 cvgratz 12324 efi4p 12509 tanaddap 12531 addcos 12538 cos2tsin 12543 demoivreALT 12566 omeo 12690 sqgcd 12831 eulerthlemth 13039 pythagtriplem16 13087 fldivp1 13156 pockthlem 13164 4sqlem10 13195 ballotfilemscr 13320 ballotfilemfrci 13329 ballotfilemfrceq 13330 gzsumval2 13773 grpinvid2 13917 imasgrp2 13972 mulgaddcomlem 14007 mulgmodid 14023 cntzsgrpcl 14167 cntzsubm 14170 ablsubsub 14212 ablsubsub4 14213 gzsumsnfd 14237 gsum2dfi 14273 opprunitd 14526 lmodfopne 14772 psrass1fi 15201 mpl0fi 15218 mplnegfi 15221 txrest 15502 limccnpcntop 15901 dvrecap 15939 dvply1 15991 cosq34lt1 16078 log2tlbndlog2 16220 birthdaylem2 16226 wilthlem1 16232 mersenne 16297 lgseisenlem1 16394 lgsquadlem1 16401 lgsquadlem2 16402 lgsquadlem3 16403 lgsquad2lem1 16405 2lgslem1 16415 qdiff 17305 |
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