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| Mirrors > Home > MPE Home > Th. List > Mathboxes > coss2cnvepres | Structured version Visualization version GIF version | ||
| Description: Special case of coss1cnvres 39705. (Contributed by Peter Mazsa, 8-Jun-2020.) |
| Ref | Expression |
|---|---|
| coss2cnvepres | ⊢ ≀ ◡(◡ E ↾ 𝐴) = {〈𝑢, 𝑣〉 ∣ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣))} |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | coss1cnvres 39705 | . 2 ⊢ ≀ ◡(◡ E ↾ 𝐴) = {〈𝑢, 𝑣〉 ∣ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑢◡ E 𝑥 ∧ 𝑣◡ E 𝑥))} | |
| 2 | brcnvep 39468 | . . . . . . 7 ⊢ (𝑢 ∈ V → (𝑢◡ E 𝑥 ↔ 𝑥 ∈ 𝑢)) | |
| 3 | 2 | elv 3459 | . . . . . 6 ⊢ (𝑢◡ E 𝑥 ↔ 𝑥 ∈ 𝑢) |
| 4 | brcnvep 39468 | . . . . . . 7 ⊢ (𝑣 ∈ V → (𝑣◡ E 𝑥 ↔ 𝑥 ∈ 𝑣)) | |
| 5 | 4 | elv 3459 | . . . . . 6 ⊢ (𝑣◡ E 𝑥 ↔ 𝑥 ∈ 𝑣) |
| 6 | 3, 5 | anbi12i 640 | . . . . 5 ⊢ ((𝑢◡ E 𝑥 ∧ 𝑣◡ E 𝑥) ↔ (𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣)) |
| 7 | 6 | exbii 1881 | . . . 4 ⊢ (∃𝑥(𝑢◡ E 𝑥 ∧ 𝑣◡ E 𝑥) ↔ ∃𝑥(𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣)) |
| 8 | 7 | anbi2i 635 | . . 3 ⊢ (((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑢◡ E 𝑥 ∧ 𝑣◡ E 𝑥)) ↔ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣))) |
| 9 | 8 | opabbii 5178 | . 2 ⊢ {〈𝑢, 𝑣〉 ∣ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑢◡ E 𝑥 ∧ 𝑣◡ E 𝑥))} = {〈𝑢, 𝑣〉 ∣ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣))} |
| 10 | 1, 9 | eqtri 2786 | 1 ⊢ ≀ ◡(◡ E ↾ 𝐴) = {〈𝑢, 𝑣〉 ∣ ((𝑢 ∈ 𝐴 ∧ 𝑣 ∈ 𝐴) ∧ ∃𝑥(𝑥 ∈ 𝑢 ∧ 𝑥 ∈ 𝑣))} |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 = wceq 1570 ∃wex 1812 ∈ wcel 2147 Vcvv 3454 class class class wbr 5108 {copab 5173 E cep 5557 ◡ccnv 5657 ↾ cres 5660 ≀ ccoss 39381 |
| 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 5255 ax-pr 5398 |
| 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-ne 2960 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 4841 df-br 5109 df-opab 5174 df-eprel 5558 df-xp 5664 df-rel 5665 df-cnv 5666 df-res 5670 df-coss 39699 |
| This theorem is used by: (None) |
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