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Mirrors > Home > MPE Home > Th. List > Mathboxes > srcmpltd | Structured version Visualization version GIF version |
Description: If a statement is true for every element of a class and for every element of its complement relative to a second class, then it is true for every element in the second class. (Contributed by BTernaryTau, 27-Sep-2023.) |
Ref | Expression |
---|---|
srcmpltd.1 | ⊢ (𝜑 → (𝐶 ∈ 𝐴 → 𝜓)) |
srcmpltd.2 | ⊢ (𝜑 → (𝐶 ∈ (𝐵 ∖ 𝐴) → 𝜓)) |
Ref | Expression |
---|---|
srcmpltd | ⊢ (𝜑 → (𝐶 ∈ 𝐵 → 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elun2 4104 | . . 3 ⊢ (𝐶 ∈ 𝐵 → 𝐶 ∈ (𝐴 ∪ 𝐵)) | |
2 | undif2 4383 | . . 3 ⊢ (𝐴 ∪ (𝐵 ∖ 𝐴)) = (𝐴 ∪ 𝐵) | |
3 | 1, 2 | eleqtrrdi 2901 | . 2 ⊢ (𝐶 ∈ 𝐵 → 𝐶 ∈ (𝐴 ∪ (𝐵 ∖ 𝐴))) |
4 | srcmpltd.1 | . . 3 ⊢ (𝜑 → (𝐶 ∈ 𝐴 → 𝜓)) | |
5 | srcmpltd.2 | . . 3 ⊢ (𝜑 → (𝐶 ∈ (𝐵 ∖ 𝐴) → 𝜓)) | |
6 | elunant 4105 | . . 3 ⊢ ((𝐶 ∈ (𝐴 ∪ (𝐵 ∖ 𝐴)) → 𝜓) ↔ ((𝐶 ∈ 𝐴 → 𝜓) ∧ (𝐶 ∈ (𝐵 ∖ 𝐴) → 𝜓))) | |
7 | 4, 5, 6 | sylanbrc 586 | . 2 ⊢ (𝜑 → (𝐶 ∈ (𝐴 ∪ (𝐵 ∖ 𝐴)) → 𝜓)) |
8 | 3, 7 | syl5 34 | 1 ⊢ (𝜑 → (𝐶 ∈ 𝐵 → 𝜓)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∈ wcel 2111 ∖ cdif 3878 ∪ cun 3879 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-tru 1541 df-ex 1782 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-rab 3115 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 |
This theorem is referenced by: prsrcmpltd 32457 |
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