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Mirrors > Home > MPE Home > Th. List > dfinfre | Structured version Visualization version Unicode version |
Description: The infimum of a set of reals . (Contributed by NM, 9-Oct-2005.) (Revised by AV, 4-Sep-2020.) |
Ref | Expression |
---|---|
dfinfre | inf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-inf 8349 | . 2 inf | |
2 | df-sup 8348 | . . 3 | |
3 | ssel2 3598 | . . . . . . . . . 10 | |
4 | lenlt 10116 | . . . . . . . . . . 11 | |
5 | vex 3203 | . . . . . . . . . . . . 13 | |
6 | vex 3203 | . . . . . . . . . . . . 13 | |
7 | 5, 6 | brcnv 5305 | . . . . . . . . . . . 12 |
8 | 7 | notbii 310 | . . . . . . . . . . 11 |
9 | 4, 8 | syl6rbbr 279 | . . . . . . . . . 10 |
10 | 3, 9 | sylan2 491 | . . . . . . . . 9 |
11 | 10 | ancoms 469 | . . . . . . . 8 |
12 | 11 | an32s 846 | . . . . . . 7 |
13 | 12 | ralbidva 2985 | . . . . . 6 |
14 | 6, 5 | brcnv 5305 | . . . . . . . . 9 |
15 | vex 3203 | . . . . . . . . . . 11 | |
16 | 6, 15 | brcnv 5305 | . . . . . . . . . 10 |
17 | 16 | rexbii 3041 | . . . . . . . . 9 |
18 | 14, 17 | imbi12i 340 | . . . . . . . 8 |
19 | 18 | ralbii 2980 | . . . . . . 7 |
20 | 19 | a1i 11 | . . . . . 6 |
21 | 13, 20 | anbi12d 747 | . . . . 5 |
22 | 21 | rabbidva 3188 | . . . 4 |
23 | 22 | unieqd 4446 | . . 3 |
24 | 2, 23 | syl5eq 2668 | . 2 |
25 | 1, 24 | syl5eq 2668 | 1 inf |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wb 196 wa 384 wceq 1483 wcel 1990 wral 2912 wrex 2913 crab 2916 wss 3574 cuni 4436 class class class wbr 4653 ccnv 5113 csup 8346 infcinf 8347 cr 9935 clt 10074 cle 10075 |
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-sn 4178 df-pr 4180 df-op 4184 df-uni 4437 df-br 4654 df-opab 4713 df-xp 5120 df-cnv 5122 df-sup 8348 df-inf 8349 df-xr 10078 df-le 10080 |
This theorem is referenced by: (None) |
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