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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 6537 tposoprab 6556 tposmpo 6557 tfrlem8 6594 frecsuc 6683 df2o3 6707 sbthlemi5 7285 sup00 7350 casedm 7433 djudm 7452 axi2m1 8249 2p2e4 9441 numsuc 9801 numsucc 9832 decmul10add 9861 5p5e10 9863 6p4e10 9864 7p3e10 9867 xnegmnf 10248 pnfaddmnf 10269 fz0tp 10546 fz0to3un2pr 10547 fzo0to2pr 10653 fzo0to3tp 10654 fzo0to42pr 10655 0tonninf 10898 1tonninf 10899 inftonninf 10900 sq4e2t8 11095 i4 11100 fac1 11189 fac3 11192 abs0 11846 absi 11847 trirecip 12293 geoihalfsum 12314 esum 12454 tan0 12523 ef01bndlem 12548 3dvds 12656 3dvdsdec 12657 3dvds2dec 12658 3lcm2e6woprm 12889 6lcm4e12 12890 gcdmodi 13230 karatsuba 13239 43prm 13265 139prm 13267 631prm 13270 1259lem1 13271 1259lem2 13272 1259lem3 13273 1259lem4 13274 1259lem5 13275 ballotfilem2 13286 ballotfilemth 13339 ennnfonelem1 13356 ndxarg 13433 setsfun 13445 setsfun0 13446 txbasval 15526 cnmpt1st 15547 cnmpt2nd 15548 dvmptidcn 15973 cos2pi 16064 tan4thpi 16101 sincos6thpi 16102 sqrt2cxp2logb9e3 16244 log2ublem2 16255 log2ublem3 16256 birthdaylog2 16261 cht1 16304 ppi1i 16305 ppi2i 16306 cht2 16309 cht3 16310 bclbnd 16340 bposlem8 16351 2lgslem3c 16452 2lgslem3d 16453 012of 17261 2o01f 17262 pwf1oexmid 17267 isomninnlem 17318 iswomninnlem 17339 ismkvnnlem 17342 |
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