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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 2206 | . 2 ⊢ (𝐴 ∈ 𝐶 ↔ 𝐵 ∈ 𝐶) |
4 | 1, 3 | mpbir 145 | 1 ⊢ 𝐴 ∈ 𝐶 |
Colors of variables: wff set class |
Syntax hints: = wceq 1332 ∈ wcel 1481 |
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 1424 ax-gen 1426 ax-ie1 1470 ax-ie2 1471 ax-4 1488 ax-17 1507 ax-ial 1515 ax-ext 2122 |
This theorem depends on definitions: df-bi 116 df-cleq 2133 df-clel 2136 |
This theorem is referenced by: eqeltrri 2214 3eltr4i 2222 intab 3808 inex2 4071 vpwex 4111 ord3ex 4122 uniopel 4186 onsucelsucexmid 4453 nnpredcl 4544 elvvuni 4611 isarep2 5218 acexmidlemcase 5777 abrexex2 6030 oprabex 6034 oprabrexex2 6036 rdg0 6292 frecex 6299 1on 6328 2on 6330 3on 6332 4on 6333 1onn 6424 2onn 6425 3onn 6426 4onn 6427 mapsnf1o2 6598 exmidpw 6810 unfiexmid 6814 xpfi 6826 ssfirab 6830 fnfi 6833 iunfidisj 6842 fidcenumlemr 6851 sbthlemi10 6862 ctmlemr 7001 exmidonfinlem 7066 acfun 7080 exmidaclem 7081 ccfunen 7096 nqex 7195 nq0ex 7272 1pr 7386 ltexprlempr 7440 recexprlempr 7464 cauappcvgprlemcl 7485 caucvgprlemcl 7508 caucvgprprlemcl 7536 addvalex 7676 peano1nnnn 7684 peano2nnnn 7685 axcnex 7691 ax1cn 7693 ax1re 7694 pnfxr 7842 mnfxr 7846 inelr 8370 cju 8743 2re 8814 3re 8818 4re 8821 5re 8823 6re 8825 7re 8827 8re 8829 9re 8831 2nn 8905 3nn 8906 4nn 8907 5nn 8908 6nn 8909 7nn 8910 8nn 8911 9nn 8912 nn0ex 9007 nneoor 9177 zeo 9180 deccl 9220 decnncl 9225 numnncl2 9228 decnncl2 9229 numsucc 9245 numma2c 9251 numadd 9252 numaddc 9253 nummul1c 9254 nummul2c 9255 xnegcl 9645 xrex 9669 ioof 9784 uzennn 10240 seqex 10251 m1expcl2 10346 faccl 10513 facwordi 10518 faclbnd2 10520 bccl 10545 crre 10661 remim 10664 absval 10805 climle 11135 climcvg1nlem 11150 iserabs 11276 geo2lim 11317 prodfclim1 11345 ere 11413 ege2le3 11414 eftlub 11433 efsep 11434 tan0 11474 ef01bndlem 11499 nn0o 11640 ennnfonelemj0 11950 ennnfonelem0 11954 ndxarg 12021 ndxslid 12023 strndxid 12026 basendxnn 12053 strle1g 12088 2strbasg 12099 2stropg 12100 setsmsbasg 12687 cnbl0 12742 cnopncntop 12745 remet 12748 divcnap 12763 climcncf 12779 expcncf 12800 cnrehmeocntop 12801 sincn 12898 coscn 12899 2logb9irrALT 13099 2irrexpq 13101 2irrexpqap 13103 bdinex2 13269 bj-inex 13276 012of 13363 2o01f 13364 peano3nninf 13376 nninfex 13380 cvgcmp2nlemabs 13402 trilpolemisumle 13406 |
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