Mathbox for Thierry Arnoux |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > isros | Structured version Visualization version Unicode version |
Description: The property of being a rings of sets, i.e. containing the empty set, and closed under finite union and set complement. (Contributed by Thierry Arnoux, 18-Jul-2020.) |
Ref | Expression |
---|---|
isros.1 |
Ref | Expression |
---|---|
isros |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eleq2 2690 | . . . 4 | |
2 | eleq2 2690 | . . . . . . 7 | |
3 | eleq2 2690 | . . . . . . 7 | |
4 | 2, 3 | anbi12d 747 | . . . . . 6 |
5 | 4 | raleqbi1dv 3146 | . . . . 5 |
6 | 5 | raleqbi1dv 3146 | . . . 4 |
7 | 1, 6 | anbi12d 747 | . . 3 |
8 | isros.1 | . . 3 | |
9 | 7, 8 | elrab2 3366 | . 2 |
10 | 3anass 1042 | . 2 | |
11 | uneq1 3760 | . . . . . 6 | |
12 | 11 | eleq1d 2686 | . . . . 5 |
13 | difeq1 3721 | . . . . . 6 | |
14 | 13 | eleq1d 2686 | . . . . 5 |
15 | 12, 14 | anbi12d 747 | . . . 4 |
16 | uneq2 3761 | . . . . . 6 | |
17 | 16 | eleq1d 2686 | . . . . 5 |
18 | difeq2 3722 | . . . . . 6 | |
19 | 18 | eleq1d 2686 | . . . . 5 |
20 | 17, 19 | anbi12d 747 | . . . 4 |
21 | 15, 20 | cbvral2v 3179 | . . 3 |
22 | 21 | 3anbi3i 1255 | . 2 |
23 | 9, 10, 22 | 3bitr2i 288 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wral 2912 crab 2916 cdif 3571 cun 3572 c0 3915 cpw 4158 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-ral 2917 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 |
This theorem is referenced by: rossspw 30232 0elros 30233 unelros 30234 difelros 30235 |
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