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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 4396 suc0 4556 unisuc 4558 iunsuc 4565 xpun 4836 dfrn2 4968 dfdmf 4974 dfrnf 5023 res0 5067 resres 5075 xpssres 5098 dfima2 5128 imai 5143 ima0 5146 imaundir 5201 xpima1 5234 xpima2m 5235 dmresv 5246 rescnvcnv 5250 dmtpop 5263 rnsnopg 5266 resdmres 5279 dmmpt 5283 dmco 5296 co01 5302 fpr 5897 fmptpr 5907 fvsnun2 5913 mpo0 6158 dmoprab 6169 rnoprab 6171 ov6g 6227 1st0 6378 2nd0 6379 dfmpo 6459 algrflem 6465 dftpos2 6532 tposoprab 6551 tposmpo 6552 tfrlem8 6589 frecsuc 6678 df2o3 6702 sbthlemi5 7278 sup00 7343 casedm 7426 djudm 7445 axi2m1 8242 2p2e4 9432 numsuc 9792 numsucc 9818 decmul10add 9847 5p5e10 9849 6p4e10 9850 7p3e10 9853 xnegmnf 10233 pnfaddmnf 10254 fz0tp 10531 fz0to3un2pr 10532 fzo0to2pr 10638 fzo0to3tp 10639 fzo0to42pr 10640 0tonninf 10879 1tonninf 10880 inftonninf 10881 sq4e2t8 11076 i4 11081 fac1 11169 fac3 11172 abs0 11826 absi 11827 trirecip 12270 geoihalfsum 12291 esum 12431 tan0 12500 ef01bndlem 12525 3dvds 12633 3dvdsdec 12634 3dvds2dec 12635 3lcm2e6woprm 12866 6lcm4e12 12867 gcdmodi 13202 karatsuba 13211 ballotfilem2 13230 ballotfilemth 13283 ennnfonelem1 13300 ndxarg 13377 setsfun 13389 setsfun0 13390 txbasval 15370 cnmpt1st 15391 cnmpt2nd 15392 dvmptidcn 15817 cos2pi 15908 tan4thpi 15945 sincos6thpi 15946 sqrt2cxp2logb9e3 16083 log2ublem2 16090 log2ublem3 16091 birthdaylog2 16096 bclbnd 16127 2lgslem3c 16226 2lgslem3d 16227 012of 17035 2o01f 17036 pwf1oexmid 17041 isomninnlem 17091 iswomninnlem 17111 ismkvnnlem 17114 |
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