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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 5800 | . 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 1542 ∈ wcel 2114 Vcvv 3430 class class class wbr 5086 I cid 5518 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5231 ax-pr 5370 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-id 5519 df-xp 5630 df-rel 5631 |
| This theorem is referenced by: dmi 5870 resieq 5949 iss 5994 elidinxp 6003 restidsing 6012 imai 6033 intasym 6072 asymref 6073 intirr 6075 poirr2 6081 cnvi 6099 xpdifid 6126 coi1 6221 dfpo2 6254 dffun2 6502 dffv2 6929 isof1oidb 7272 idssen 8937 dflt2 13090 relexpindlem 15016 ex-chn1 18594 opsrtoslem2 22044 hausdiag 23620 hauseqlcld 23621 metustid 24529 ltgov 28679 ex-id 30519 dfso2 35953 idsset 36086 dfon3 36088 elfix 36099 dffix2 36101 sscoid 36109 dffun10 36110 elfuns 36111 brsingle 36113 brapply 36134 lemsuccf 36137 dfrdg4 36149 bj-imdiridlem 37515 iss2 38679 undmrnresiss 44049 dffrege99 44407 ipo0 44893 ifr0 44894 fourierdlem42 46595 |
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