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Mirrors > Home > MPE Home > Th. List > xrinfmexpnf | Structured version Visualization version Unicode version |
Description: Adding plus infinity to a set does not affect the existence of its infimum. (Contributed by NM, 19-Jan-2006.) |
Ref | Expression |
---|---|
xrinfmexpnf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elun 3753 | . . . . . 6 | |
2 | simpr 477 | . . . . . . 7 | |
3 | velsn 4193 | . . . . . . . . 9 | |
4 | pnfnlt 11962 | . . . . . . . . . 10 | |
5 | breq1 4656 | . . . . . . . . . . 11 | |
6 | 5 | notbid 308 | . . . . . . . . . 10 |
7 | 4, 6 | syl5ibrcom 237 | . . . . . . . . 9 |
8 | 3, 7 | syl5bi 232 | . . . . . . . 8 |
9 | 8 | adantr 481 | . . . . . . 7 |
10 | 2, 9 | jaod 395 | . . . . . 6 |
11 | 1, 10 | syl5bi 232 | . . . . 5 |
12 | 11 | ex 450 | . . . 4 |
13 | 12 | ralimdv2 2961 | . . 3 |
14 | elun1 3780 | . . . . . . . 8 | |
15 | 14 | anim1i 592 | . . . . . . 7 |
16 | 15 | reximi2 3010 | . . . . . 6 |
17 | 16 | imim2i 16 | . . . . 5 |
18 | 17 | ralimi 2952 | . . . 4 |
19 | 18 | a1i 11 | . . 3 |
20 | 13, 19 | anim12d 586 | . 2 |
21 | 20 | reximia 3009 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wn 3 wi 4 wo 383 wa 384 wceq 1483 wcel 1990 wral 2912 wrex 2913 cun 3572 csn 4177 class class class wbr 4653 cpnf 10071 cxr 10073 clt 10074 |
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-pow 4843 ax-pr 4906 ax-un 6949 ax-cnex 9992 ax-resscn 9993 |
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-ne 2795 df-nel 2898 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-pnf 10076 df-mnf 10077 df-xr 10078 df-ltxr 10079 |
This theorem is referenced by: xrinfmss 12140 |
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