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Mirrors > Home > MPE Home > Th. List > Mathboxes > inelsros | Structured version Visualization version Unicode version |
Description: A semi-ring of sets is closed under union. (Contributed by Thierry Arnoux, 18-Jul-2020.) |
Ref | Expression |
---|---|
issros.1 | Disj |
Ref | Expression |
---|---|
inelsros |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simp2 1062 | . . 3 | |
2 | simp3 1063 | . . 3 | |
3 | issros.1 | . . . . . 6 Disj | |
4 | 3 | issros 30238 | . . . . 5 Disj |
5 | 4 | simp3bi 1078 | . . . 4 Disj |
6 | 5 | 3ad2ant1 1082 | . . 3 Disj |
7 | ineq1 3807 | . . . . . 6 | |
8 | 7 | eleq1d 2686 | . . . . 5 |
9 | difeq1 3721 | . . . . . . . 8 | |
10 | 9 | eqeq1d 2624 | . . . . . . 7 |
11 | 10 | 3anbi3d 1405 | . . . . . 6 Disj Disj |
12 | 11 | rexbidv 3052 | . . . . 5 Disj Disj |
13 | 8, 12 | anbi12d 747 | . . . 4 Disj Disj |
14 | ineq2 3808 | . . . . . 6 | |
15 | 14 | eleq1d 2686 | . . . . 5 |
16 | difeq2 3722 | . . . . . . . 8 | |
17 | 16 | eqeq1d 2624 | . . . . . . 7 |
18 | 17 | 3anbi3d 1405 | . . . . . 6 Disj Disj |
19 | 18 | rexbidv 3052 | . . . . 5 Disj Disj |
20 | 15, 19 | anbi12d 747 | . . . 4 Disj Disj |
21 | 13, 20 | rspc2va 3323 | . . 3 Disj Disj |
22 | 1, 2, 6, 21 | syl21anc 1325 | . 2 Disj |
23 | 22 | simpld 475 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 w3a 1037 wceq 1483 wcel 1990 wral 2912 wrex 2913 crab 2916 cdif 3571 cin 3573 c0 3915 cpw 4158 cuni 4436 Disj wdisj 4620 cfn 7955 |
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-rex 2918 df-rab 2921 df-v 3202 df-dif 3577 df-in 3581 df-ss 3588 df-pw 4160 |
This theorem is referenced by: (None) |
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