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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 5839 | . 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 209 = wceq 1570 ∈ wcel 2143 Vcvv 3455 class class class wbr 5110 I cid 5557 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5258 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-br 5111 df-opab 5175 df-id 5558 df-xp 5669 df-rel 5670 |
| This theorem is referenced by: cnvi 5873 dmi 5913 resieq 5991 iss 6039 elidinxp 6048 restidsing 6057 imai 6078 intasym 6117 asymref 6118 intirr 6120 poirr2 6126 xpdifid 6167 coi1 6266 dfpo2 6299 dffun2 6548 dffv2 6978 isof1oidb 7324 idssen 8995 dflt2 13174 relexpindlem 15102 ex-chn1 18694 opsrtoslem2 22188 hausdiag 23783 hauseqlcld 23784 metustid 24692 ltgov 28844 ex-id 30763 dfso2 36225 idsset 36358 dfon3 36360 elfix 36371 dffix2 36373 sscoid 36381 dffun10 36382 elfuns 36383 brsingle 36385 brapply 36406 lemsuccf 36409 dfrdg4 36421 bj-imdiridlem 37807 iss2 38971 undmrnresiss 44310 dffrege99 44668 ipo0 45138 ifr0 45139 fourierdlem42 46843 |
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