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Mirrors > Home > ILE Home > Th. List > renemnf | Unicode version |
Description: No real equals minus infinity. (Contributed by NM, 14-Oct-2005.) (Proof shortened by Andrew Salmon, 19-Nov-2011.) |
Ref | Expression |
---|---|
renemnf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mnfnre 7801 | . . . 4 | |
2 | 1 | neli 2403 | . . 3 |
3 | eleq1 2200 | . . 3 | |
4 | 2, 3 | mtbiri 664 | . 2 |
5 | 4 | necon2ai 2360 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wceq 1331 wcel 1480 wne 2306 cr 7612 cmnf 7791 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-setind 4447 ax-cnex 7704 ax-resscn 7705 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-pw 3507 df-sn 3528 df-pr 3529 df-uni 3732 df-pnf 7795 df-mnf 7796 |
This theorem is referenced by: renemnfd 7810 renfdisj 7817 ltxrlt 7823 xrnemnf 9557 xrlttri3 9576 ngtmnft 9593 xrrebnd 9595 rexneg 9606 xrmnfdc 9619 rexadd 9628 xaddnemnf 9633 xaddcom 9637 xaddid1 9638 xnegdi 9644 xpncan 9647 xleadd1a 9649 xltadd1 9652 xposdif 9658 xrmaxrecl 11017 isxmet2d 12506 |
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