Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > mulgt0ii | Unicode version |
Description: The product of two positive numbers is positive. (Contributed by NM, 18-May-1999.) |
Ref | Expression |
---|---|
lt.1 | |
lt.2 | |
mulgt0i.3 | |
mulgt0i.4 |
Ref | Expression |
---|---|
mulgt0ii |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | mulgt0i.3 | . 2 | |
2 | mulgt0i.4 | . 2 | |
3 | lt.1 | . . 3 | |
4 | lt.2 | . . 3 | |
5 | 3, 4 | mulgt0i 7866 | . 2 |
6 | 1, 2, 5 | mp2an 422 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 class class class wbr 3924 (class class class)co 5767 cr 7612 cc0 7613 cmul 7618 clt 7793 |
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-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-pow 4093 ax-pr 4126 ax-un 4350 ax-setind 4447 ax-cnex 7704 ax-resscn 7705 ax-1re 7707 ax-addrcl 7710 ax-mulrcl 7712 ax-rnegex 7722 ax-pre-mulgt0 7730 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-eu 2000 df-mo 2001 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-nel 2402 df-ral 2419 df-rex 2420 df-rab 2423 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-op 3531 df-uni 3732 df-br 3925 df-opab 3985 df-xp 4540 df-pnf 7795 df-mnf 7796 df-ltxr 7798 |
This theorem is referenced by: ef01bndlem 11452 |
Copyright terms: Public domain | W3C validator |