Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > pwsal | Structured version Visualization version Unicode version |
Description: The power set of a given set is a sigma-algebra (the so called discrete sigma-algebra). (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
pwsal | SAlg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 0elpw 4834 | . . . 4 | |
2 | 1 | a1i 11 | . . 3 |
3 | unipw 4918 | . . . . . . . 8 | |
4 | 3 | difeq1i 3724 | . . . . . . 7 |
5 | 4 | a1i 11 | . . . . . 6 |
6 | difssd 3738 | . . . . . . 7 | |
7 | difexg 4808 | . . . . . . . 8 | |
8 | elpwg 4166 | . . . . . . . 8 | |
9 | 7, 8 | syl 17 | . . . . . . 7 |
10 | 6, 9 | mpbird 247 | . . . . . 6 |
11 | 5, 10 | eqeltrd 2701 | . . . . 5 |
12 | 11 | adantr 481 | . . . 4 |
13 | 12 | ralrimiva 2966 | . . 3 |
14 | elpwi 4168 | . . . . . . . . 9 | |
15 | uniss 4458 | . . . . . . . . 9 | |
16 | 14, 15 | syl 17 | . . . . . . . 8 |
17 | 16, 3 | syl6sseq 3651 | . . . . . . 7 |
18 | vuniex 6954 | . . . . . . . . 9 | |
19 | 18 | a1i 11 | . . . . . . . 8 |
20 | elpwg 4166 | . . . . . . . 8 | |
21 | 19, 20 | syl 17 | . . . . . . 7 |
22 | 17, 21 | mpbird 247 | . . . . . 6 |
23 | 22 | adantl 482 | . . . . 5 |
24 | 23 | a1d 25 | . . . 4 |
25 | 24 | ralrimiva 2966 | . . 3 |
26 | 2, 13, 25 | 3jca 1242 | . 2 |
27 | pwexg 4850 | . . 3 | |
28 | issal 40534 | . . 3 SAlg | |
29 | 27, 28 | syl 17 | . 2 SAlg |
30 | 26, 29 | mpbird 247 | 1 SAlg |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wral 2912 cvv 3200 cdif 3571 wss 3574 c0 3915 cpw 4158 cuni 4436 class class class wbr 4653 com 7065 cdom 7953 SAlgcsalg 40528 |
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-8 1992 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 ax-sep 4781 ax-nul 4789 ax-pow 4843 ax-pr 4906 ax-un 6949 |
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-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-pw 4160 df-sn 4178 df-pr 4180 df-uni 4437 df-salg 40529 |
This theorem is referenced by: salgenval 40541 salgenn0 40549 salgencntex 40561 psmeasure 40688 |
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