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Mirrors > Home > ILE Home > Th. List > eqeltri | GIF version |
Description: Substitution of equal classes into membership relation. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
eqeltr.1 | ⊢ 𝐴 = 𝐵 |
eqeltr.2 | ⊢ 𝐵 ∈ 𝐶 |
Ref | Expression |
---|---|
eqeltri | ⊢ 𝐴 ∈ 𝐶 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqeltr.2 | . 2 ⊢ 𝐵 ∈ 𝐶 | |
2 | eqeltr.1 | . . 3 ⊢ 𝐴 = 𝐵 | |
3 | 2 | eleq1i 2205 | . 2 ⊢ (𝐴 ∈ 𝐶 ↔ 𝐵 ∈ 𝐶) |
4 | 1, 3 | mpbir 145 | 1 ⊢ 𝐴 ∈ 𝐶 |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 ∈ wcel 1480 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-5 1423 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-4 1487 ax-17 1506 ax-ial 1514 ax-ext 2121 |
This theorem depends on definitions: df-bi 116 df-cleq 2132 df-clel 2135 |
This theorem is referenced by: eqeltrri 2213 3eltr4i 2221 intab 3800 inex2 4063 vpwex 4103 ord3ex 4114 uniopel 4178 onsucelsucexmid 4445 nnpredcl 4536 elvvuni 4603 isarep2 5210 acexmidlemcase 5769 abrexex2 6022 oprabex 6026 oprabrexex2 6028 rdg0 6284 frecex 6291 1on 6320 2on 6322 3on 6324 4on 6325 1onn 6416 2onn 6417 3onn 6418 4onn 6419 mapsnf1o2 6590 exmidpw 6802 unfiexmid 6806 xpfi 6818 ssfirab 6822 fnfi 6825 iunfidisj 6834 fidcenumlemr 6843 sbthlemi10 6854 ctmlemr 6993 exmidonfinlem 7049 acfun 7063 exmidaclem 7064 ccfunen 7079 nqex 7171 nq0ex 7248 1pr 7362 ltexprlempr 7416 recexprlempr 7440 cauappcvgprlemcl 7461 caucvgprlemcl 7484 caucvgprprlemcl 7512 addvalex 7652 peano1nnnn 7660 peano2nnnn 7661 axcnex 7667 ax1cn 7669 ax1re 7670 pnfxr 7818 mnfxr 7822 inelr 8346 cju 8719 2re 8790 3re 8794 4re 8797 5re 8799 6re 8801 7re 8803 8re 8805 9re 8807 2nn 8881 3nn 8882 4nn 8883 5nn 8884 6nn 8885 7nn 8886 8nn 8887 9nn 8888 nn0ex 8983 nneoor 9153 zeo 9156 deccl 9196 decnncl 9201 numnncl2 9204 decnncl2 9205 numsucc 9221 numma2c 9227 numadd 9228 numaddc 9229 nummul1c 9230 nummul2c 9231 xnegcl 9615 xrex 9639 ioof 9754 uzennn 10209 seqex 10220 m1expcl2 10315 faccl 10481 facwordi 10486 faclbnd2 10488 bccl 10513 crre 10629 remim 10632 absval 10773 climle 11103 climcvg1nlem 11118 iserabs 11244 geo2lim 11285 prodfclim1 11313 ere 11376 ege2le3 11377 eftlub 11396 efsep 11397 tan0 11438 ef01bndlem 11463 nn0o 11604 ennnfonelemj0 11914 ennnfonelem0 11918 ndxarg 11982 ndxslid 11984 strndxid 11987 basendxnn 12014 strle1g 12049 2strbasg 12060 2stropg 12061 setsmsbasg 12648 cnbl0 12703 cnopncntop 12706 remet 12709 divcnap 12724 climcncf 12740 expcncf 12761 cnrehmeocntop 12762 sincn 12858 coscn 12859 bdinex2 13098 bj-inex 13105 peano3nninf 13201 nninfex 13205 isomninnlem 13225 cvgcmp2nlemabs 13227 trilpolemisumle 13231 |
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