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Mirrors > Home > ILE Home > Th. List > pnfnre | Unicode version |
Description: Plus infinity is not a real number. (Contributed by NM, 13-Oct-2005.) |
Ref | Expression |
---|---|
pnfnre |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | cnex 7005 | . . . . . 6 | |
2 | 1 | uniex 4174 | . . . . 5 |
3 | pwuninel2 5897 | . . . . 5 | |
4 | 2, 3 | ax-mp 7 | . . . 4 |
5 | df-pnf 7062 | . . . . 5 | |
6 | 5 | eleq1i 2103 | . . . 4 |
7 | 4, 6 | mtbir 596 | . . 3 |
8 | recn 7014 | . . 3 | |
9 | 7, 8 | mto 588 | . 2 |
10 | 9 | nelir 2300 | 1 |
Colors of variables: wff set class |
Syntax hints: wn 3 wcel 1393 wnel 2205 cvv 2557 cpw 3359 cuni 3580 cc 6887 cr 6888 cpnf 7057 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 ax-in1 544 ax-in2 545 ax-io 630 ax-5 1336 ax-7 1337 ax-gen 1338 ax-ie1 1382 ax-ie2 1383 ax-8 1395 ax-10 1396 ax-11 1397 ax-i12 1398 ax-bndl 1399 ax-4 1400 ax-13 1404 ax-14 1405 ax-17 1419 ax-i9 1423 ax-ial 1427 ax-i5r 1428 ax-ext 2022 ax-sep 3875 ax-un 4170 ax-cnex 6975 ax-resscn 6976 |
This theorem depends on definitions: df-bi 110 df-tru 1246 df-fal 1249 df-nf 1350 df-sb 1646 df-clab 2027 df-cleq 2033 df-clel 2036 df-nfc 2167 df-nel 2207 df-rex 2312 df-rab 2315 df-v 2559 df-in 2924 df-ss 2931 df-pw 3361 df-uni 3581 df-pnf 7062 |
This theorem is referenced by: renepnf 7073 xrltnr 8701 pnfnlt 8708 |
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