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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 5808 | . 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 3442 class class class wbr 5100 I cid 5526 |
| 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 2709 ax-sep 5243 ax-pr 5379 |
| 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 2716 df-cleq 2729 df-clel 2812 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-id 5527 df-xp 5638 df-rel 5639 |
| This theorem is referenced by: dmi 5878 resieq 5957 iss 6002 elidinxp 6011 restidsing 6020 imai 6041 intasym 6080 asymref 6081 intirr 6083 poirr2 6089 cnvi 6107 xpdifid 6134 coi1 6229 dfpo2 6262 dffun2 6510 dffv2 6937 isof1oidb 7280 idssen 8946 dflt2 13074 relexpindlem 14998 ex-chn1 18572 opsrtoslem2 22023 hausdiag 23601 hauseqlcld 23602 metustid 24510 ltgov 28681 ex-id 30521 dfso2 35968 idsset 36101 dfon3 36103 elfix 36114 dffix2 36116 sscoid 36124 dffun10 36125 elfuns 36126 brsingle 36128 brapply 36149 lemsuccf 36152 dfrdg4 36164 bj-imdiridlem 37434 iss2 38589 undmrnresiss 43954 dffrege99 44312 ipo0 44798 ifr0 44799 fourierdlem42 46501 |
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