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| Mirrors > Home > ILE Home > Th. List > 3eqtri | GIF version | ||
| Description: An inference from three chained equalities. (Contributed by NM, 29-Aug-1993.) |
| Ref | Expression |
|---|---|
| 3eqtri.1 | ⊢ 𝐴 = 𝐵 |
| 3eqtri.2 | ⊢ 𝐵 = 𝐶 |
| 3eqtri.3 | ⊢ 𝐶 = 𝐷 |
| Ref | Expression |
|---|---|
| 3eqtri | ⊢ 𝐴 = 𝐷 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3eqtri.1 | . 2 ⊢ 𝐴 = 𝐵 | |
| 2 | 3eqtri.2 | . . 3 ⊢ 𝐵 = 𝐶 | |
| 3 | 3eqtri.3 | . . 3 ⊢ 𝐶 = 𝐷 | |
| 4 | 2, 3 | eqtri 2259 | . 2 ⊢ 𝐵 = 𝐷 |
| 5 | 1, 4 | eqtri 2259 | 1 ⊢ 𝐴 = 𝐷 |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: = 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: csbid 3155 un23 3388 in32 3443 dfrab2 3508 dfnul4 3522 difun2 3607 if0ab 3641 tpidm23 3812 unisn 3951 dfiunv2 4048 uniop 4398 suc0 4558 unisuc 4560 iunsuc 4567 xpun 4838 dfrn2 4970 dfdmf 4976 dfrnf 5025 res0 5069 resres 5077 xpssres 5100 dfima2 5131 imai 5146 ima0 5149 imaundir 5204 xpima1 5237 xpima2m 5238 dmresv 5249 rescnvcnv 5253 dmtpop 5266 rnsnopg 5269 resdmres 5282 dmmpt 5286 dmco 5299 co01 5305 fpr 5900 fmptpr 5910 fvsnun2 5916 mpo0 6161 dmoprab 6172 rnoprab 6174 ov6g 6230 1st0 6382 2nd0 6383 dfmpo 6463 algrflem 6469 dftpos2 6536 tposoprab 6555 tposmpo 6556 tfrlem8 6593 frecsuc 6682 df2o3 6706 sbthlemi5 7284 sup00 7350 casedm 7433 djudm 7452 axi2m1 8249 2p2e4 9441 numsuc 9802 numsucc 9833 decmul10add 9862 5p5e10 9864 6p4e10 9865 7p3e10 9868 xnegmnf 10249 pnfaddmnf 10270 fz0tp 10547 fz0to3un2pr 10548 fzo0to2pr 10654 fzo0to3tp 10655 fzo0to42pr 10656 0tonninf 10899 1tonninf 10900 inftonninf 10901 sq4e2t8 11096 i4 11101 fac1 11190 fac3 11193 abs0 11847 absi 11848 trirecip 12294 geoihalfsum 12315 esum 12455 tan0 12524 ef01bndlem 12549 3dvds 12657 3dvdsdec 12658 3dvds2dec 12659 3lcm2e6woprm 12890 6lcm4e12 12891 gcdmodi 13231 karatsuba 13240 43prm 13266 139prm 13268 631prm 13271 1259lem1 13272 1259lem2 13273 1259lem3 13274 1259lem4 13275 1259lem5 13276 ballotfilem2 13287 ballotfilemth 13340 ennnfonelem1 13357 ndxarg 13434 setsfun 13446 setsfun0 13447 txbasval 15505 cnmpt1st 15526 cnmpt2nd 15527 dvmptidcn 15952 cos2pi 16043 tan4thpi 16080 sincos6thpi 16081 sqrt2cxp2logb9e3 16223 log2ublem2 16234 log2ublem3 16235 birthdaylog2 16240 cht1 16283 ppi1i 16284 ppi2i 16285 cht2 16288 cht3 16289 bclbnd 16319 bposlem8 16330 2lgslem3c 16431 2lgslem3d 16432 012of 17240 2o01f 17241 pwf1oexmid 17246 isomninnlem 17297 iswomninnlem 17318 ismkvnnlem 17321 |
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