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Related theorems GIF version |
| Description: Closure of join in Cℋ. |
| Ref | Expression |
|---|---|
| chjclt | ⊢ ((A ∈ Cℋ ∧ B ∈ Cℋ ) → (A ∨ℋ B) ∈ Cℋ ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | shjclt 5329 | . 2 ⊢ ((A ∈ Sℋ ∧ B ∈ Sℋ ) → (A ∨ℋ B) ∈ Cℋ ) | |
| 2 | chsh 5131 | . 2 ⊢ (A ∈ Cℋ → A ∈ Sℋ ) | |
| 3 | chsh 5131 | . 2 ⊢ (B ∈ Cℋ → B ∈ Sℋ ) | |
| 4 | 1, 2, 3 | syl2an 349 | 1 ⊢ ((A ∈ Cℋ ∧ B ∈ Cℋ ) → (A ∨ℋ B) ∈ Cℋ ) |
| Colors of variables: wff set class |
| Syntax hints: → wi 2 ∧ wa 196 ∈ wcel 1092 (class class class)co 3001 Sℋ csh 4967 Cℋ cch 4968 ∨ℋ chj 4972 |
| This theorem is referenced by: spansnsclt 5541 strlem3a 5693 spansncv2t 5725 mdbr2 5728 dmdbr 5731 chcv1t 5751 cvexchlem 5759 atcv0eq 5767 atexch 5769 atcvatlem 5770 atcvat2 5772 atcvat3 5774 atcvat4 5775 mdsymlem1 5776 mdsymlem3 5778 mdsymlem5 5780 mdsymlem6 5781 |
| 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-un 1076 ax-pow 1077 ax-reg 1078 ax-inf 1079 ax-hilex 4983 ax-hvaddcl 4984 ax-hvzercl 4987 ax-hvmulcl 4989 ax-hvmulass 4992 ax-hvmulzer 4995 ax-hicl 5043 ax-his1 5045 ax-his2 5046 ax-his3 5047 ax-his4 5048 |
| This theorem depends on definitions: df-bi 128 df-or 197 df-an 198 df-3or 582 df-3an 583 df-ex 679 df-sb 853 df-eu 1009 df-mo |