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| Mirrors > Home > MPE Home > Th. List > elimasng | Structured version Visualization version GIF version | ||
| Description: Membership in an image of a singleton. (Contributed by Raph Levien, 21-Oct-2006.) TODO: replace existing usages by usages of elimasng1 6044, remove, and relabel elimasng1 6044 to "elimasng". |
| Ref | Expression |
|---|---|
| elimasng | ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑊) → (𝐶 ∈ (𝐴 “ {𝐵}) ↔ 〈𝐵, 𝐶〉 ∈ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | elimasng1 6044 | . 2 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑊) → (𝐶 ∈ (𝐴 “ {𝐵}) ↔ 𝐵𝐴𝐶)) | |
| 2 | df-br 5097 | . 2 ⊢ (𝐵𝐴𝐶 ↔ 〈𝐵, 𝐶〉 ∈ 𝐴) | |
| 3 | 1, 2 | bitrdi 287 | 1 ⊢ ((𝐵 ∈ 𝑉 ∧ 𝐶 ∈ 𝑊) → (𝐶 ∈ (𝐴 “ {𝐵}) ↔ 〈𝐵, 𝐶〉 ∈ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2113 {csn 4578 〈cop 4584 class class class wbr 5096 “ cima 5625 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2713 df-cleq 2726 df-clel 2809 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-sn 4579 df-pr 4581 df-op 4585 df-br 5097 df-opab 5159 df-xp 5628 df-cnv 5630 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 |
| This theorem is referenced by: elimasn 6047 inimasn 6112 dffv3 6828 fvimacnv 6996 fvrnressn 7104 elecg 8677 imasnopn 23632 imasncld 23633 imasncls 23634 ustelimasn 24165 blval2 24504 elbl4 24505 scutval 27768 iunsnima2 32646 1stpreimas 32734 opelco3 35918 funpartfv 36088 eltail 36517 elecALTV 38403 brtrclfv2 43910 frege77d 43929 dfafv23 47441 |
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