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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 5836 | . 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 1570 ∈ wcel 2147 Vcvv 3454 class class class wbr 5106 I cid 5550 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5253 ax-pr 5396 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5172 df-id 5551 df-xp 5662 df-rel 5663 |
| This theorem is used by: cnvi 5871 dmi 5911 resieq 5993 iss 6040 elidinxp 6049 restidsing 6058 imai 6085 intasym 6122 asymref 6123 intirr 6125 poirr2 6131 xpdifid 6172 idresdmsscocnv1 6276 coi1 6280 dfpo2 6320 dffun2 6571 dffv2 7006 isof1oidb 7358 idssen 9055 dflt2 13307 relexpindlem 15248 ex-chn1 18843 opsrtoslem2 22398 hausdiag 23997 hauseqlcld 23998 metustid 24906 ltgov 29093 ex-id 31068 dfso2 36711 idsset 36843 dfon3 36845 elfix 36856 dffix2 36858 sscoid 36866 dffun10 36867 elfuns 36868 brsingle 36870 brapply 36891 lemsuccf 36894 dfrdg4 36906 coi1res 38164 bj-imdiridlem 38311 iss2 39479 undmrnresiss 44807 dffrege99 45165 ipo0 45634 ifr0 45635 fourierdlem42 47374 |
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