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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 5796 | . 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 206 = wceq 1541 ∈ wcel 2111 Vcvv 3436 class class class wbr 5093 I cid 5513 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 ax-sep 5236 ax-nul 5246 ax-pr 5372 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-ss 3914 df-nul 4283 df-if 4475 df-sn 4576 df-pr 4578 df-op 4582 df-br 5094 df-opab 5156 df-id 5514 df-xp 5625 df-rel 5626 |
| This theorem is referenced by: dmi 5866 resieq 5944 iss 5989 elidinxp 5998 restidsing 6007 imai 6028 intasym 6067 asymref 6068 intirr 6070 poirr2 6076 cnvi 6094 xpdifid 6121 coi1 6216 dfpo2 6249 dffun2 6497 dffv2 6923 isof1oidb 7264 idssen 8925 dflt2 13053 relexpindlem 14976 ex-chn1 18549 opsrtoslem2 21997 hausdiag 23566 hauseqlcld 23567 metustid 24475 ltgov 28581 ex-id 30421 dfso2 35806 idsset 35939 dfon3 35941 elfix 35952 dffix2 35954 sscoid 35962 dffun10 35963 elfuns 35964 brsingle 35966 brapply 35987 lemsuccf 35990 dfrdg4 36002 bj-imdiridlem 37236 iss2 38382 undmrnresiss 43702 dffrege99 44060 ipo0 44546 ifr0 44547 fourierdlem42 46252 |
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