Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > intsal | Structured version Visualization version Unicode version |
Description: The arbitrary intersection of sigma-algebra (on the same set ) is a sigma-algebra ( on the same set , see intsaluni 40547). (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
intsal.ga | SAlg |
intsal.gn0 | |
intsal.x |
Ref | Expression |
---|---|
intsal | SAlg |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 473 | . . . . . 6 | |
2 | intsal.ga | . . . . . . 7 SAlg | |
3 | 2 | sselda 3603 | . . . . . 6 SAlg |
4 | simpr 477 | . . . . . . 7 SAlg SAlg | |
5 | 0sal 40540 | . . . . . . 7 SAlg | |
6 | 4, 5 | syl 17 | . . . . . 6 SAlg |
7 | 1, 3, 6 | syl2anc 693 | . . . . 5 |
8 | 7 | ralrimiva 2966 | . . . 4 |
9 | 0ex 4790 | . . . . 5 | |
10 | 9 | elint2 4482 | . . . 4 |
11 | 8, 10 | sylibr 224 | . . 3 |
12 | intsal.x | . . . . . . . . . 10 | |
13 | intsal.gn0 | . . . . . . . . . . . . 13 | |
14 | 2, 13, 12 | intsaluni 40547 | . . . . . . . . . . . 12 |
15 | 14 | eqcomd 2628 | . . . . . . . . . . 11 |
16 | 15 | adantr 481 | . . . . . . . . . 10 |
17 | 12, 16 | eqtr2d 2657 | . . . . . . . . 9 |
18 | 17 | difeq1d 3727 | . . . . . . . 8 |
19 | 18 | adantlr 751 | . . . . . . 7 |
20 | 3 | adantlr 751 | . . . . . . . 8 SAlg |
21 | elinti 4485 | . . . . . . . . . 10 | |
22 | 21 | imp 445 | . . . . . . . . 9 |
23 | 22 | adantll 750 | . . . . . . . 8 |
24 | saldifcl 40539 | . . . . . . . 8 SAlg | |
25 | 20, 23, 24 | syl2anc 693 | . . . . . . 7 |
26 | 19, 25 | eqeltrd 2701 | . . . . . 6 |
27 | 26 | ralrimiva 2966 | . . . . 5 |
28 | intex 4820 | . . . . . . . . . . 11 | |
29 | 28 | biimpi 206 | . . . . . . . . . 10 |
30 | 13, 29 | syl 17 | . . . . . . . . 9 |
31 | uniexg 6955 | . . . . . . . . 9 | |
32 | 30, 31 | syl 17 | . . . . . . . 8 |
33 | difexg 4808 | . . . . . . . 8 | |
34 | 32, 33 | syl 17 | . . . . . . 7 |
35 | 34 | adantr 481 | . . . . . 6 |
36 | elintg 4483 | . . . . . 6 | |
37 | 35, 36 | syl 17 | . . . . 5 |
38 | 27, 37 | mpbird 247 | . . . 4 |
39 | 38 | ralrimiva 2966 | . . 3 |
40 | 3 | ad4ant14 1293 | . . . . . . . 8 SAlg |
41 | elpwi 4168 | . . . . . . . . . . . . 13 | |
42 | 41 | adantr 481 | . . . . . . . . . . . 12 |
43 | intss1 4492 | . . . . . . . . . . . . 13 | |
44 | 43 | adantl 482 | . . . . . . . . . . . 12 |
45 | 42, 44 | sstrd 3613 | . . . . . . . . . . 11 |
46 | vex 3203 | . . . . . . . . . . . 12 | |
47 | 46 | elpw 4164 | . . . . . . . . . . 11 |
48 | 45, 47 | sylibr 224 | . . . . . . . . . 10 |
49 | 48 | adantll 750 | . . . . . . . . 9 |
50 | 49 | adantlr 751 | . . . . . . . 8 |
51 | simplr 792 | . . . . . . . 8 | |
52 | 40, 50, 51 | salunicl 40536 | . . . . . . 7 |
53 | 52 | ralrimiva 2966 | . . . . . 6 |
54 | vuniex 6954 | . . . . . . . 8 | |
55 | 54 | a1i 11 | . . . . . . 7 |
56 | elintg 4483 | . . . . . . 7 | |
57 | 55, 56 | syl 17 | . . . . . 6 |
58 | 53, 57 | mpbird 247 | . . . . 5 |
59 | 58 | ex 450 | . . . 4 |
60 | 59 | ralrimiva 2966 | . . 3 |
61 | 11, 39, 60 | 3jca 1242 | . 2 |
62 | issal 40534 | . . 3 SAlg | |
63 | 30, 62 | syl 17 | . 2 SAlg |
64 | 61, 63 | mpbird 247 | 1 SAlg |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 wa 384 w3a 1037 wceq 1483 wcel 1990 wne 2794 wral 2912 cvv 3200 cdif 3571 wss 3574 c0 3915 cpw 4158 cuni 4436 cint 4475 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-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-ne 2795 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-if 4087 df-pw 4160 df-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-int 4476 df-br 4654 df-salg 40529 |
This theorem is referenced by: salgencl 40550 |
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