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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 |
| This proof depends on syntax axioms: ↔ wb 209 = wceq 1569 ∈ wcel 2144 Vcvv 3450 class class class wbr 5102 I cid 5544 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-id 5545 df-xp 5656 df-rel 5657 |
| This theorem is used by: cnvi 5862 dmi 5902 resieq 5980 iss 6026 elidinxp 6035 restidsing 6044 imai 6071 intasym 6108 asymref 6109 intirr 6111 poirr2 6117 xpdifid 6158 coi1 6264 dfpo2 6299 dffun2 6548 dffv2 6980 isof1oidb 7332 idssen 9027 dflt2 13280 relexpindlem 15221 ex-chn1 18816 opsrtoslem2 22370 hausdiag 23969 hauseqlcld 23970 metustid 24878 ltgov 29065 ex-id 31040 dfso2 36612 idsset 36744 dfon3 36746 elfix 36757 dffix2 36759 sscoid 36767 dffun10 36768 elfuns 36769 brsingle 36771 brapply 36792 lemsuccf 36795 dfrdg4 36807 coi1in 38053 bj-imdiridlem 38199 iss2 39369 undmrnresiss 44697 dffrege99 45055 ipo0 45525 ifr0 45526 fourierdlem42 47252 |
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