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| Description: Transitive law for class equality. Proposition 4.7(3) of [TakeutiZaring] p. 13. |
| Ref | Expression |
|---|---|
| eqtr |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eqeq1 1890 |
. 2
| |
| 2 | 1 | biimpar 461 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| This theorem is referenced by: eqtr2 1905 eqtr2OLD 1906 eqtr3 1907 sylan9eq 1948 eqvinc 2387 preqsn 3157 iderOLD 5327 eqer 5329 xpmapenlem4 5593 infeq5 5727 cfom 6064 uzindOLD 7420 sn0top 8917 cnconst 9057 gapm 9462 ring2 9474 efif1lem5 10088 twpar2 10149 ficard 10176 cncomp 10331 usinuniop 10341 ismnd2 10392 rnplrnml0 10402 ringidmlem 10409 on1el3 10412 on1el4 10413 ring1cl 10415 uznzr 10416 bnj545 13271 bnj934 13334 bnj953 13343 mulgcdlem2 13757 poseq 13954 soseq 13955 dfoprab4spop 14339 neiopne 14354 oooeqim2 14356 domfldref 14365 fldsqcp2 14378 sqpeq 14383 cmprelid2 14447 resrelfld 14448 injrec 14461 surjsec 14462 fopab2g 14485 injsurinj 14487 repfuntw 14502 cbcpcp 14504 unprj 14511 nZdef 14527 jidd 14540 midd 14541 valcurfn1 14552 preoref22 14570 ubos2 14598 supdef 14604 mxlelt2 14606 mnlelt2 14608 defse3 14614 istoset2 14628 dfps2 14634 isdir2 14640 ridlideq 14695 rzrlzreq 14696 clfsebs2 14710 symgfo 14730 grpdivone 14736 rngmgmbs3 14766 rnplrnml3 14768 zerdivemp1 14785 zintdom 14787 svs2 14829 homcard 14893 subspemp 14903 subtopsin2 14907 cnfilca 14927 limfillem2 14939 limvinlv 14941 bwt2 14960 clindistop 14962 trhom 14983 tpgprop1 14986 tpgprop2 14987 altretop 14997 dualcat2lem 15129 dualded2lem 15130 imonclem 15162 isepic 15173 cptarc 15242 opncldf1 15402 subsubtop 15423 compfipin0lem 15435 compfipin0 15436 fbasfip 15556 filssufil 15571 inficl 15757 phtpycom 16050 phtpyco 16056 phtpcer 16062 zerdivemp1x 16108 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-gen 1305 ax-17 1317 ax-4 1319 ax-5o 1321 ax-ext 1865 |
| This theorem depends on definitions: df-bi 164 df-an 242 df-cleq 1877 |