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| Mirrors > Home > MPE Home > Th. List > Mathboxes > disjeccnvep | Structured version Visualization version GIF version | ||
| Description: Property of the epsilon relation. (Contributed by Peter Mazsa, 27-Apr-2020.) |
| Ref | Expression |
|---|---|
| disjeccnvep | ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (([𝐴]◡ E ∩ [𝐵]◡ E ) = ∅ ↔ (𝐴 ∩ 𝐵) = ∅)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eccnvep 39411 | . . 3 ⊢ (𝐴 ∈ 𝑉 → [𝐴]◡ E = 𝐴) | |
| 2 | eccnvep 39411 | . . 3 ⊢ (𝐵 ∈ 𝑊 → [𝐵]◡ E = 𝐵) | |
| 3 | 1, 2 | ineqan12d 4122 | . 2 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → ([𝐴]◡ E ∩ [𝐵]◡ E ) = (𝐴 ∩ 𝐵)) |
| 4 | 3 | eqeq1d 2765 | 1 ⊢ ((𝐴 ∈ 𝑉 ∧ 𝐵 ∈ 𝑊) → (([𝐴]◡ E ∩ [𝐵]◡ E ) = ∅ ↔ (𝐴 ∩ 𝐵) = ∅)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ∈ wcel 2147 ∩ cin 4092 ∅c0 4281 E cep 5554 ◡ccnv 5654 [cec 8740 |
| 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 5252 ax-pr 5395 |
| 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 4839 df-br 5107 df-opab 5171 df-eprel 5555 df-xp 5661 df-rel 5662 df-cnv 5663 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-ec 8744 |
| This theorem is used by: disjecxrncnvep 39536 |
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