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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 5806 | . 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 3429 class class class wbr 5085 I cid 5525 |
| 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 2708 ax-sep 5231 ax-pr 5375 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-id 5526 df-xp 5637 df-rel 5638 |
| This theorem is referenced by: dmi 5876 resieq 5955 iss 6000 elidinxp 6009 restidsing 6018 imai 6039 intasym 6078 asymref 6079 intirr 6081 poirr2 6087 cnvi 6105 xpdifid 6132 coi1 6227 dfpo2 6260 dffun2 6508 dffv2 6935 isof1oidb 7279 idssen 8944 dflt2 13099 relexpindlem 15025 ex-chn1 18603 opsrtoslem2 22034 hausdiag 23610 hauseqlcld 23611 metustid 24519 ltgov 28665 ex-id 30504 dfso2 35937 idsset 36070 dfon3 36072 elfix 36083 dffix2 36085 sscoid 36093 dffun10 36094 elfuns 36095 brsingle 36097 brapply 36118 lemsuccf 36121 dfrdg4 36133 bj-imdiridlem 37499 iss2 38665 undmrnresiss 44031 dffrege99 44389 ipo0 44875 ifr0 44876 fourierdlem42 46577 |
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