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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 5716 | . 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 208 = wceq 1533 ∈ wcel 2110 Vcvv 3494 class class class wbr 5058 I cid 5453 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pr 5321 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4561 df-pr 4563 df-op 4567 df-br 5059 df-opab 5121 df-id 5454 df-xp 5555 df-rel 5556 |
This theorem is referenced by: dmi 5785 resieq 5858 iss 5897 elidinxp 5905 restidsing 5916 imai 5936 intasym 5969 asymref 5970 intirr 5972 poirr2 5978 cnvi 5994 xpdifid 6019 coi1 6109 dffv2 6750 isof1oidb 7071 idssen 8548 dflt2 12535 relexpindlem 14416 opsrtoslem2 20259 hausdiag 22247 hauseqlcld 22248 metustid 23158 ltgov 26377 ex-id 28207 dfso2 32985 dfpo2 32986 idsset 33346 dfon3 33348 elfix 33359 dffix2 33361 sscoid 33369 dffun10 33370 elfuns 33371 brsingle 33373 brapply 33394 brsuccf 33397 dfrdg4 33407 bj-imdirid 34469 iss2 35595 undmrnresiss 39957 dffrege99 40301 ipo0 40774 ifr0 40775 fourierdlem42 42428 |
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