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Mirrors > Home > ILE Home > Th. List > mulgt1 | Unicode version |
Description: The product of two numbers greater than 1 is greater than 1. (Contributed by NM, 13-Feb-2005.) |
Ref | Expression |
---|---|
mulgt1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | simpl 108 | . . . . 5 | |
2 | 1 | a1i 9 | . . . 4 |
3 | 0lt1 8046 | . . . . . . . . 9 | |
4 | 0re 7920 | . . . . . . . . . 10 | |
5 | 1re 7919 | . . . . . . . . . 10 | |
6 | lttr 7993 | . . . . . . . . . 10 | |
7 | 4, 5, 6 | mp3an12 1322 | . . . . . . . . 9 |
8 | 3, 7 | mpani 428 | . . . . . . . 8 |
9 | 8 | adantr 274 | . . . . . . 7 |
10 | ltmul2 8772 | . . . . . . . . . . 11 | |
11 | 10 | biimpd 143 | . . . . . . . . . 10 |
12 | 5, 11 | mp3an1 1319 | . . . . . . . . 9 |
13 | 12 | exp32 363 | . . . . . . . 8 |
14 | 13 | impcom 124 | . . . . . . 7 |
15 | 9, 14 | syld 45 | . . . . . 6 |
16 | 15 | impd 252 | . . . . 5 |
17 | ax-1rid 7881 | . . . . . . 7 | |
18 | 17 | adantr 274 | . . . . . 6 |
19 | 18 | breq1d 3999 | . . . . 5 |
20 | 16, 19 | sylibd 148 | . . . 4 |
21 | 2, 20 | jcad 305 | . . 3 |
22 | remulcl 7902 | . . . 4 | |
23 | lttr 7993 | . . . . 5 | |
24 | 5, 23 | mp3an1 1319 | . . . 4 |
25 | 22, 24 | syldan 280 | . . 3 |
26 | 21, 25 | syld 45 | . 2 |
27 | 26 | imp 123 | 1 |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 w3a 973 wceq 1348 wcel 2141 class class class wbr 3989 (class class class)co 5853 cr 7773 cc0 7774 c1 7775 cmul 7779 clt 7954 |
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 609 ax-in2 610 ax-io 704 ax-5 1440 ax-7 1441 ax-gen 1442 ax-ie1 1486 ax-ie2 1487 ax-8 1497 ax-10 1498 ax-11 1499 ax-i12 1500 ax-bndl 1502 ax-4 1503 ax-17 1519 ax-i9 1523 ax-ial 1527 ax-i5r 1528 ax-13 2143 ax-14 2144 ax-ext 2152 ax-sep 4107 ax-pow 4160 ax-pr 4194 ax-un 4418 ax-setind 4521 ax-cnex 7865 ax-resscn 7866 ax-1cn 7867 ax-1re 7868 ax-icn 7869 ax-addcl 7870 ax-addrcl 7871 ax-mulcl 7872 ax-mulrcl 7873 ax-addcom 7874 ax-mulcom 7875 ax-addass 7876 ax-mulass 7877 ax-distr 7878 ax-i2m1 7879 ax-0lt1 7880 ax-1rid 7881 ax-0id 7882 ax-rnegex 7883 ax-precex 7884 ax-cnre 7885 ax-pre-lttrn 7888 ax-pre-ltadd 7890 ax-pre-mulgt0 7891 |
This theorem depends on definitions: df-bi 116 df-3an 975 df-tru 1351 df-fal 1354 df-nf 1454 df-sb 1756 df-eu 2022 df-mo 2023 df-clab 2157 df-cleq 2163 df-clel 2166 df-nfc 2301 df-ne 2341 df-nel 2436 df-ral 2453 df-rex 2454 df-reu 2455 df-rab 2457 df-v 2732 df-sbc 2956 df-dif 3123 df-un 3125 df-in 3127 df-ss 3134 df-pw 3568 df-sn 3589 df-pr 3590 df-op 3592 df-uni 3797 df-br 3990 df-opab 4051 df-id 4278 df-xp 4617 df-rel 4618 df-cnv 4619 df-co 4620 df-dm 4621 df-iota 5160 df-fun 5200 df-fv 5206 df-riota 5809 df-ov 5856 df-oprab 5857 df-mpo 5858 df-pnf 7956 df-mnf 7957 df-ltxr 7959 df-sub 8092 df-neg 8093 |
This theorem is referenced by: mulgt1d 8852 addltmul 9114 uz2mulcl 9567 |
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