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Mirrors > Home > MPE Home > Th. List > infglb | Structured version Visualization version Unicode version |
Description: An infimum is the greatest lower bound. See also infcl 8394 and inflb 8395. (Contributed by AV, 3-Sep-2020.) |
Ref | Expression |
---|---|
infcl.1 | |
infcl.2 |
Ref | Expression |
---|---|
infglb | inf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-inf 8349 | . . . . 5 inf | |
2 | 1 | breq1i 4660 | . . . 4 inf |
3 | simpr 477 | . . . . 5 | |
4 | infcl.1 | . . . . . . . 8 | |
5 | cnvso 5674 | . . . . . . . 8 | |
6 | 4, 5 | sylib 208 | . . . . . . 7 |
7 | infcl.2 | . . . . . . . 8 | |
8 | 4, 7 | infcllem 8393 | . . . . . . 7 |
9 | 6, 8 | supcl 8364 | . . . . . 6 |
10 | 9 | adantr 481 | . . . . 5 |
11 | brcnvg 5303 | . . . . . 6 | |
12 | 11 | bicomd 213 | . . . . 5 |
13 | 3, 10, 12 | syl2anc 693 | . . . 4 |
14 | 2, 13 | syl5bb 272 | . . 3 inf |
15 | 6, 8 | suplub 8366 | . . . . 5 |
16 | 15 | expdimp 453 | . . . 4 |
17 | vex 3203 | . . . . . 6 | |
18 | brcnvg 5303 | . . . . . 6 | |
19 | 3, 17, 18 | sylancl 694 | . . . . 5 |
20 | 19 | rexbidv 3052 | . . . 4 |
21 | 16, 20 | sylibd 229 | . . 3 |
22 | 14, 21 | sylbid 230 | . 2 inf |
23 | 22 | expimpd 629 | 1 inf |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wb 196 wa 384 wcel 1990 wral 2912 wrex 2913 cvv 3200 class class class wbr 4653 wor 5034 ccnv 5113 csup 8346 infcinf 8347 |
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-3or 1038 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-ne 2795 df-ral 2917 df-rex 2918 df-reu 2919 df-rmo 2920 df-rab 2921 df-v 3202 df-sbc 3436 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-po 5035 df-so 5036 df-cnv 5122 df-iota 5851 df-riota 6611 df-sup 8348 df-inf 8349 |
This theorem is referenced by: infnlb 8398 omssubaddlem 30361 omssubadd 30362 gtinf 32313 infxrunb2 39584 |
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