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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 5828 | . 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 1563 ∈ wcel 2145 Vcvv 3457 class class class wbr 5105 I cid 5546 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1818 ax-4 1832 ax-5 1933 ax-6 1990 ax-7 2031 ax-8 2147 ax-9 2155 ax-ext 2737 ax-sep 5251 ax-pr 5395 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1566 df-fal 1576 df-ex 1803 df-sb 2094 df-clab 2744 df-cleq 2757 df-clel 2840 df-ral 3080 df-rex 3090 df-rab 3418 df-v 3459 df-dif 3910 df-un 3912 df-in 3914 df-ss 3924 df-nul 4289 df-if 4484 df-sn 4586 df-pr 4588 df-op 4592 df-br 5106 df-opab 5168 df-id 5547 df-xp 5658 df-rel 5659 |
| This theorem is referenced by: cnvi 5862 dmi 5902 resieq 5980 iss 6028 elidinxp 6037 restidsing 6046 imai 6067 intasym 6106 asymref 6107 intirr 6109 poirr2 6115 xpdifid 6157 coi1 6254 dfpo2 6287 dffun2 6535 dffv2 6966 isof1oidb 7312 idssen 8982 dflt2 13164 relexpindlem 15090 ex-chn1 18683 opsrtoslem2 22167 hausdiag 23763 hauseqlcld 23764 metustid 24672 ltgov 28824 ex-id 30694 dfso2 36118 idsset 36251 dfon3 36253 elfix 36264 dffix2 36266 sscoid 36274 dffun10 36275 elfuns 36276 brsingle 36278 brapply 36299 lemsuccf 36302 dfrdg4 36314 bj-imdiridlem 37689 iss2 38855 undmrnresiss 44192 dffrege99 44550 ipo0 45022 ifr0 45023 fourierdlem42 46721 |
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