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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 5717 | . 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 3495 class class class wbr 5059 I cid 5454 |
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 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pr 5322 |
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 3497 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-br 5060 df-opab 5122 df-id 5455 df-xp 5556 df-rel 5557 |
This theorem is referenced by: dmi 5786 resieq 5859 iss 5898 elidinxp 5906 restidsing 5917 imai 5937 intasym 5970 asymref 5971 intirr 5973 poirr2 5979 cnvi 5995 xpdifid 6020 coi1 6110 dffv2 6751 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 42427 |
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