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Related theorems GIF version |
| Description: The covering relation implies proper subset. |
| Ref | Expression |
|---|---|
| cvpsst | ⊢ ((A ∈ Cℋ ∧ B ∈ Cℋ ) → (A ⋖ B → A ⊂ B)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cvbrt 5714 | . 2 ⊢ ((A ∈ Cℋ ∧ B ∈ Cℋ ) → (A ⋖ B ↔ (A ⊂ B ∧ ¬ ∃x ∈ Cℋ (A ⊂ x ∧ x ⊂ B)))) | |
| 2 | pm3.26 256 | . 2 ⊢ ((A ⊂ B ∧ ¬ ∃x ∈ Cℋ (A ⊂ x ∧ x ⊂ B)) → A ⊂ B) | |
| 3 | 1, 2 | syl6bi 187 | 1 ⊢ ((A ∈ Cℋ ∧ B ∈ Cℋ ) → (A ⋖ B → A ⊂ B)) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 1 → wi 2 ∧ wa 196 ∈ wcel 1092 ∃wrex 1202 ⊂ wpss 1488 class class class wbr 2054 Cℋ cch 4968 ⋖ ccv 4981 |
| This theorem is referenced by: cvnsymt 5722 cvntrt 5724 atcveq0 5746 chcv1t 5751 cvexchlem 5759 atexch 5769 atcvat2 5772 |
| This theorem was proved from axioms: ax-1 3 ax-2 4 ax-3 5 ax-mp 6 ax-4 673 ax-5 674 ax-6 675 ax-7 676 ax-gen 677 ax-8 798 ax-9 799 ax-10 800 ax-11 801 ax-12 802 ax-13 804 ax-14 805 ax-16 922 ax-17 925 ax-ext 1074 ax-rep 1075 ax-pow 1077 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-ex 679 df-sb 853 df-clab 1093 df-cleq 1097 df-clel 1099 df-ne 1192 df-rex 1206 df-v 1349 df-dif 1489 df-un 1490 df-in 1491 df-ss 1492 df-pss 1494 df-nul 1708 df-pw 1799 df-sn 1811 df-pr 1812 df-op 1815 df-br 2063 df-opab 2098 df-cv 5712 |