Mathbox for Glauco Siliprandi |
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Mirrors > Home > MPE Home > Th. List > Mathboxes > salpreimalegt | Structured version Visualization version Unicode version |
Description: If all the preimages of right-closed, unbounded below intervals, belong to a sigma-algebra, then all the preimages of left-open, unbounded above intervals, belong to the sigma-algebra. (ii) implies (iii) in Proposition 121B of [Fremlin1] p. 35. (Contributed by Glauco Siliprandi, 26-Jun-2021.) |
Ref | Expression |
---|---|
salpreimalegt.x | |
salpreimalegt.a | |
salpreimalegt.s | SAlg |
salpreimalegt.u | |
salpreimalegt.b | |
salpreimalegt.p | |
salpreimalegt.c |
Ref | Expression |
---|---|
salpreimalegt |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | salpreimalegt.u | . . . . . 6 | |
2 | 1 | eqcomi 2631 | . . . . 5 |
3 | 2 | a1i 11 | . . . 4 |
4 | 3 | difeq1d 3727 | . . 3 |
5 | salpreimalegt.x | . . . 4 | |
6 | salpreimalegt.b | . . . 4 | |
7 | salpreimalegt.c | . . . . 5 | |
8 | 7 | rexrd 10089 | . . . 4 |
9 | 5, 6, 8 | preimalegt 40913 | . . 3 |
10 | 4, 9 | eqtr2d 2657 | . 2 |
11 | salpreimalegt.s | . . 3 SAlg | |
12 | 7 | ancli 574 | . . . 4 |
13 | nfcv 2764 | . . . . 5 | |
14 | salpreimalegt.a | . . . . . . 7 | |
15 | nfv 1843 | . . . . . . 7 | |
16 | 14, 15 | nfan 1828 | . . . . . 6 |
17 | nfv 1843 | . . . . . 6 | |
18 | 16, 17 | nfim 1825 | . . . . 5 |
19 | eleq1 2689 | . . . . . . 7 | |
20 | 19 | anbi2d 740 | . . . . . 6 |
21 | breq2 4657 | . . . . . . . 8 | |
22 | 21 | rabbidv 3189 | . . . . . . 7 |
23 | 22 | eleq1d 2686 | . . . . . 6 |
24 | 20, 23 | imbi12d 334 | . . . . 5 |
25 | salpreimalegt.p | . . . . 5 | |
26 | 13, 18, 24, 25 | vtoclgf 3264 | . . . 4 |
27 | 7, 12, 26 | sylc 65 | . . 3 |
28 | 11, 27 | saldifcld 40565 | . 2 |
29 | 10, 28 | eqeltrd 2701 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wa 384 wceq 1483 wnf 1708 wcel 1990 crab 2916 cdif 3571 cuni 4436 class class class wbr 4653 cr 9935 cxr 10073 clt 10074 cle 10075 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 ax-sep 4781 ax-nul 4789 ax-pr 4906 |
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-eu 2474 df-mo 2475 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-opab 4713 df-xp 5120 df-cnv 5122 df-xr 10078 df-le 10080 df-salg 40529 |
This theorem is referenced by: salpreimalelt 40938 issmfgt 40965 |
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