Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > salunicl | Structured version Visualization version Unicode version |
Description: SAlg sigma-algebra is closed under countable union. (Contributed by Glauco Siliprandi, 17-Aug-2020.) |
Ref | Expression |
---|---|
salunicl.s | SAlg |
salunicl.t | |
salunicl.tct |
Ref | Expression |
---|---|
salunicl |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | salunicl.tct | . 2 | |
2 | salunicl.t | . . 3 | |
3 | salunicl.s | . . . . 5 SAlg | |
4 | issal 40534 | . . . . . 6 SAlg SAlg | |
5 | 3, 4 | syl 17 | . . . . 5 SAlg |
6 | 3, 5 | mpbid 222 | . . . 4 |
7 | 6 | simp3d 1075 | . . 3 |
8 | breq1 4656 | . . . . 5 | |
9 | unieq 4444 | . . . . . 6 | |
10 | 9 | eleq1d 2686 | . . . . 5 |
11 | 8, 10 | imbi12d 334 | . . . 4 |
12 | 11 | rspcva 3307 | . . 3 |
13 | 2, 7, 12 | syl2anc 693 | . 2 |
14 | 1, 13 | mpd 15 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 196 w3a 1037 wceq 1483 wcel 1990 wral 2912 cdif 3571 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-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-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-br 4654 df-salg 40529 |
This theorem is referenced by: saliuncl 40542 intsal 40548 smfpimbor1lem1 41005 |
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