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Mirrors > Home > MPE Home > Th. List > ideq | Structured version Visualization version GIF version |
Description: For sets, the identity relation is the same as equality. (Contributed by NM, 13-Aug-1995.) |
Ref | Expression |
---|---|
ideq.1 | ⊢ 𝐵 ∈ V |
Ref | Expression |
---|---|
ideq | ⊢ (𝐴 I 𝐵 ↔ 𝐴 = 𝐵) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ideq.1 | . 2 ⊢ 𝐵 ∈ V | |
2 | ideqg 5705 | . 2 ⊢ (𝐵 ∈ V → (𝐴 I 𝐵 ↔ 𝐴 = 𝐵)) | |
3 | 1, 2 | ax-mp 5 | 1 ⊢ (𝐴 I 𝐵 ↔ 𝐴 = 𝐵) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 209 = wceq 1543 ∈ wcel 2112 Vcvv 3398 class class class wbr 5039 I cid 5439 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-ext 2708 ax-sep 5177 ax-nul 5184 ax-pr 5307 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-br 5040 df-opab 5102 df-id 5440 df-xp 5542 df-rel 5543 |
This theorem is referenced by: dmi 5775 resieq 5847 iss 5888 elidinxp 5896 restidsing 5907 imai 5927 intasym 5960 asymref 5961 intirr 5963 poirr2 5969 cnvi 5985 xpdifid 6011 coi1 6106 dffv2 6784 isof1oidb 7111 idssen 8651 dflt2 12703 relexpindlem 14591 opsrtoslem2 20967 hausdiag 22496 hauseqlcld 22497 metustid 23406 ltgov 26642 ex-id 28471 dfso2 33391 dfpo2 33392 idsset 33878 dfon3 33880 elfix 33891 dffix2 33893 sscoid 33901 dffun10 33902 elfuns 33903 brsingle 33905 brapply 33926 brsuccf 33929 dfrdg4 33939 bj-imdiridlem 35040 iss2 36165 undmrnresiss 40829 dffrege99 41188 ipo0 41681 ifr0 41682 fourierdlem42 43308 |
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