Step | Hyp | Ref
| Expression |
1 | | itg2mono.1 |
. . . . . . . . . 10
β’ πΊ = (π₯ β β β¦ sup(ran (π β β β¦ ((πΉβπ)βπ₯)), β, < )) |
2 | | itg2mono.2 |
. . . . . . . . . 10
β’ ((π β§ π β β) β (πΉβπ) β MblFn) |
3 | | itg2mono.3 |
. . . . . . . . . 10
β’ ((π β§ π β β) β (πΉβπ):ββΆ(0[,)+β)) |
4 | | itg2mono.4 |
. . . . . . . . . 10
β’ ((π β§ π β β) β (πΉβπ) βr β€ (πΉβ(π + 1))) |
5 | | itg2mono.5 |
. . . . . . . . . 10
β’ ((π β§ π₯ β β) β βπ¦ β β βπ β β ((πΉβπ)βπ₯) β€ π¦) |
6 | | itg2mono.6 |
. . . . . . . . . 10
β’ π = sup(ran (π β β β¦
(β«2β(πΉβπ))), β*, <
) |
7 | | itg2monolem2.7 |
. . . . . . . . . 10
β’ (π β π β dom
β«1) |
8 | | itg2monolem2.8 |
. . . . . . . . . 10
β’ (π β π βr β€ πΊ) |
9 | | itg2monolem2.9 |
. . . . . . . . . 10
β’ (π β Β¬
(β«1βπ)
β€ π) |
10 | 1, 2, 3, 4, 5, 6, 7, 8, 9 | itg2monolem2 25261 |
. . . . . . . . 9
β’ (π β π β β) |
11 | 10 | adantr 482 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β π β
β) |
12 | 11 | recnd 11239 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β π β
β) |
13 | 7 | adantr 482 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β π β dom
β«1) |
14 | | itg1cl 25194 |
. . . . . . . . 9
β’ (π β dom β«1
β (β«1βπ) β β) |
15 | 13, 14 | syl 17 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β
(β«1βπ)
β β) |
16 | 15 | recnd 11239 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β
(β«1βπ)
β β) |
17 | | simpr 486 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β π‘ β
β+) |
18 | 17 | rpred 13013 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β π‘ β
β) |
19 | 11, 18 | readdcld 11240 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β (π + π‘) β β) |
20 | 19 | recnd 11239 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β (π + π‘) β β) |
21 | | 0red 11214 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β 0 β
β) |
22 | | 0xr 11258 |
. . . . . . . . . . . 12
β’ 0 β
β* |
23 | 22 | a1i 11 |
. . . . . . . . . . 11
β’ (π β 0 β
β*) |
24 | | fveq2 6889 |
. . . . . . . . . . . . . 14
β’ (π = 1 β (πΉβπ) = (πΉβ1)) |
25 | 24 | feq1d 6700 |
. . . . . . . . . . . . 13
β’ (π = 1 β ((πΉβπ):ββΆ(0[,]+β) β (πΉβ1):ββΆ(0[,]+β))) |
26 | | icossicc 13410 |
. . . . . . . . . . . . . . 15
β’
(0[,)+β) β (0[,]+β) |
27 | | fss 6732 |
. . . . . . . . . . . . . . 15
β’ (((πΉβπ):ββΆ(0[,)+β) β§
(0[,)+β) β (0[,]+β)) β (πΉβπ):ββΆ(0[,]+β)) |
28 | 3, 26, 27 | sylancl 587 |
. . . . . . . . . . . . . 14
β’ ((π β§ π β β) β (πΉβπ):ββΆ(0[,]+β)) |
29 | 28 | ralrimiva 3147 |
. . . . . . . . . . . . 13
β’ (π β βπ β β (πΉβπ):ββΆ(0[,]+β)) |
30 | | 1nn 12220 |
. . . . . . . . . . . . . 14
β’ 1 β
β |
31 | 30 | a1i 11 |
. . . . . . . . . . . . 13
β’ (π β 1 β
β) |
32 | 25, 29, 31 | rspcdva 3614 |
. . . . . . . . . . . 12
β’ (π β (πΉβ1):ββΆ(0[,]+β)) |
33 | | itg2cl 25242 |
. . . . . . . . . . . 12
β’ ((πΉβ1):ββΆ(0[,]+β)
β (β«2β(πΉβ1)) β
β*) |
34 | 32, 33 | syl 17 |
. . . . . . . . . . 11
β’ (π β
(β«2β(πΉβ1)) β
β*) |
35 | | itg2cl 25242 |
. . . . . . . . . . . . . . . 16
β’ ((πΉβπ):ββΆ(0[,]+β) β
(β«2β(πΉβπ)) β
β*) |
36 | 28, 35 | syl 17 |
. . . . . . . . . . . . . . 15
β’ ((π β§ π β β) β
(β«2β(πΉβπ)) β
β*) |
37 | 36 | fmpttd 7112 |
. . . . . . . . . . . . . 14
β’ (π β (π β β β¦
(β«2β(πΉβπ))):ββΆβ*) |
38 | 37 | frnd 6723 |
. . . . . . . . . . . . 13
β’ (π β ran (π β β β¦
(β«2β(πΉβπ))) β
β*) |
39 | | supxrcl 13291 |
. . . . . . . . . . . . 13
β’ (ran
(π β β β¦
(β«2β(πΉβπ))) β β* β
sup(ran (π β β
β¦ (β«2β(πΉβπ))), β*, < ) β
β*) |
40 | 38, 39 | syl 17 |
. . . . . . . . . . . 12
β’ (π β sup(ran (π β β β¦
(β«2β(πΉβπ))), β*, < ) β
β*) |
41 | 6, 40 | eqeltrid 2838 |
. . . . . . . . . . 11
β’ (π β π β
β*) |
42 | | itg2ge0 25245 |
. . . . . . . . . . . 12
β’ ((πΉβ1):ββΆ(0[,]+β)
β 0 β€ (β«2β(πΉβ1))) |
43 | 32, 42 | syl 17 |
. . . . . . . . . . 11
β’ (π β 0 β€
(β«2β(πΉβ1))) |
44 | | 2fveq3 6894 |
. . . . . . . . . . . . . . . 16
β’ (π = 1 β
(β«2β(πΉβπ)) = (β«2β(πΉβ1))) |
45 | | eqid 2733 |
. . . . . . . . . . . . . . . 16
β’ (π β β β¦
(β«2β(πΉβπ))) = (π β β β¦
(β«2β(πΉβπ))) |
46 | | fvex 6902 |
. . . . . . . . . . . . . . . 16
β’
(β«2β(πΉβ1)) β V |
47 | 44, 45, 46 | fvmpt 6996 |
. . . . . . . . . . . . . . 15
β’ (1 β
β β ((π β
β β¦ (β«2β(πΉβπ)))β1) =
(β«2β(πΉβ1))) |
48 | 30, 47 | ax-mp 5 |
. . . . . . . . . . . . . 14
β’ ((π β β β¦
(β«2β(πΉβπ)))β1) =
(β«2β(πΉβ1)) |
49 | 37 | ffnd 6716 |
. . . . . . . . . . . . . . 15
β’ (π β (π β β β¦
(β«2β(πΉβπ))) Fn β) |
50 | | fnfvelrn 7080 |
. . . . . . . . . . . . . . 15
β’ (((π β β β¦
(β«2β(πΉβπ))) Fn β β§ 1 β β) β
((π β β β¦
(β«2β(πΉβπ)))β1) β ran (π β β β¦
(β«2β(πΉβπ)))) |
51 | 49, 30, 50 | sylancl 587 |
. . . . . . . . . . . . . 14
β’ (π β ((π β β β¦
(β«2β(πΉβπ)))β1) β ran (π β β β¦
(β«2β(πΉβπ)))) |
52 | 48, 51 | eqeltrrid 2839 |
. . . . . . . . . . . . 13
β’ (π β
(β«2β(πΉβ1)) β ran (π β β β¦
(β«2β(πΉβπ)))) |
53 | | supxrub 13300 |
. . . . . . . . . . . . 13
β’ ((ran
(π β β β¦
(β«2β(πΉβπ))) β β* β§
(β«2β(πΉβ1)) β ran (π β β β¦
(β«2β(πΉβπ)))) β (β«2β(πΉβ1)) β€ sup(ran (π β β β¦
(β«2β(πΉβπ))), β*, <
)) |
54 | 38, 52, 53 | syl2anc 585 |
. . . . . . . . . . . 12
β’ (π β
(β«2β(πΉβ1)) β€ sup(ran (π β β β¦
(β«2β(πΉβπ))), β*, <
)) |
55 | 54, 6 | breqtrrdi 5190 |
. . . . . . . . . . 11
β’ (π β
(β«2β(πΉβ1)) β€ π) |
56 | 23, 34, 41, 43, 55 | xrletrd 13138 |
. . . . . . . . . 10
β’ (π β 0 β€ π) |
57 | 56 | adantr 482 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β 0 β€
π) |
58 | 11, 17 | ltaddrpd 13046 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β π < (π + π‘)) |
59 | 21, 11, 19, 57, 58 | lelttrd 11369 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β 0 <
(π + π‘)) |
60 | 59 | gt0ne0d 11775 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β (π + π‘) β 0) |
61 | 12, 16, 20, 60 | div23d 12024 |
. . . . . 6
β’ ((π β§ π‘ β β+) β ((π Β·
(β«1βπ)) / (π + π‘)) = ((π / (π + π‘)) Β· (β«1βπ))) |
62 | 11, 19, 60 | redivcld 12039 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β (π / (π + π‘)) β β) |
63 | 62, 15 | remulcld 11241 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β ((π / (π + π‘)) Β· (β«1βπ)) β
β) |
64 | | halfre 12423 |
. . . . . . . . 9
β’ (1 / 2)
β β |
65 | | ifcl 4573 |
. . . . . . . . 9
β’ (((π / (π + π‘)) β β β§ (1 / 2) β
β) β if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β β) |
66 | 62, 64, 65 | sylancl 587 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β β) |
67 | 66, 15 | remulcld 11241 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ)) β β) |
68 | | max2 13163 |
. . . . . . . . 9
β’ (((1 / 2)
β β β§ (π /
(π + π‘)) β β) β (π / (π + π‘)) β€ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2))) |
69 | 64, 62, 68 | sylancr 588 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β (π / (π + π‘)) β€ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2))) |
70 | 7, 14 | syl 17 |
. . . . . . . . . . . . . 14
β’ (π β
(β«1βπ)
β β) |
71 | 70 | rexrd 11261 |
. . . . . . . . . . . . 13
β’ (π β
(β«1βπ)
β β*) |
72 | | xrltnle 11278 |
. . . . . . . . . . . . 13
β’ ((π β β*
β§ (β«1βπ) β β*) β (π <
(β«1βπ)
β Β¬ (β«1βπ) β€ π)) |
73 | 41, 71, 72 | syl2anc 585 |
. . . . . . . . . . . 12
β’ (π β (π < (β«1βπ) β Β¬
(β«1βπ)
β€ π)) |
74 | 9, 73 | mpbird 257 |
. . . . . . . . . . 11
β’ (π β π < (β«1βπ)) |
75 | 74 | adantr 482 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β π <
(β«1βπ)) |
76 | 21, 11, 15, 57, 75 | lelttrd 11369 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β 0 <
(β«1βπ)) |
77 | | lemul1 12063 |
. . . . . . . . 9
β’ (((π / (π + π‘)) β β β§ if((1 / 2) β€
(π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β β β§
((β«1βπ) β β β§ 0 <
(β«1βπ))) β ((π / (π + π‘)) β€ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β ((π / (π + π‘)) Β· (β«1βπ)) β€ (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ)))) |
78 | 62, 66, 15, 76, 77 | syl112anc 1375 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β ((π / (π + π‘)) β€ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β ((π / (π + π‘)) Β· (β«1βπ)) β€ (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ)))) |
79 | 69, 78 | mpbid 231 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β ((π / (π + π‘)) Β· (β«1βπ)) β€ (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ))) |
80 | 2 | adantlr 714 |
. . . . . . . 8
β’ (((π β§ π‘ β β+) β§ π β β) β (πΉβπ) β MblFn) |
81 | 3 | adantlr 714 |
. . . . . . . 8
β’ (((π β§ π‘ β β+) β§ π β β) β (πΉβπ):ββΆ(0[,)+β)) |
82 | 4 | adantlr 714 |
. . . . . . . 8
β’ (((π β§ π‘ β β+) β§ π β β) β (πΉβπ) βr β€ (πΉβ(π + 1))) |
83 | 5 | adantlr 714 |
. . . . . . . 8
β’ (((π β§ π‘ β β+) β§ π₯ β β) β
βπ¦ β β
βπ β β
((πΉβπ)βπ₯) β€ π¦) |
84 | 64 | a1i 11 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β (1 / 2)
β β) |
85 | | halfgt0 12425 |
. . . . . . . . . . 11
β’ 0 < (1
/ 2) |
86 | 85 | a1i 11 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β 0 < (1
/ 2)) |
87 | | max1 13161 |
. . . . . . . . . . 11
β’ (((1 / 2)
β β β§ (π /
(π + π‘)) β β) β (1 / 2) β€ if((1
/ 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2))) |
88 | 64, 62, 87 | sylancr 588 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β (1 / 2)
β€ if((1 / 2) β€ (π /
(π + π‘)), (π / (π + π‘)), (1 / 2))) |
89 | 21, 84, 66, 86, 88 | ltletrd 11371 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β 0 <
if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2))) |
90 | 20 | mulridd 11228 |
. . . . . . . . . . . 12
β’ ((π β§ π‘ β β+) β ((π + π‘) Β· 1) = (π + π‘)) |
91 | 58, 90 | breqtrrd 5176 |
. . . . . . . . . . 11
β’ ((π β§ π‘ β β+) β π < ((π + π‘) Β· 1)) |
92 | | 1red 11212 |
. . . . . . . . . . . 12
β’ ((π β§ π‘ β β+) β 1 β
β) |
93 | | ltdivmul 12086 |
. . . . . . . . . . . 12
β’ ((π β β β§ 1 β
β β§ ((π + π‘) β β β§ 0 <
(π + π‘))) β ((π / (π + π‘)) < 1 β π < ((π + π‘) Β· 1))) |
94 | 11, 92, 19, 59, 93 | syl112anc 1375 |
. . . . . . . . . . 11
β’ ((π β§ π‘ β β+) β ((π / (π + π‘)) < 1 β π < ((π + π‘) Β· 1))) |
95 | 91, 94 | mpbird 257 |
. . . . . . . . . 10
β’ ((π β§ π‘ β β+) β (π / (π + π‘)) < 1) |
96 | | halflt1 12427 |
. . . . . . . . . 10
β’ (1 / 2)
< 1 |
97 | | breq1 5151 |
. . . . . . . . . . 11
β’ ((π / (π + π‘)) = if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β ((π / (π + π‘)) < 1 β if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1)) |
98 | | breq1 5151 |
. . . . . . . . . . 11
β’ ((1 / 2)
= if((1 / 2) β€ (π /
(π + π‘)), (π / (π + π‘)), (1 / 2)) β ((1 / 2) < 1 β
if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1)) |
99 | 97, 98 | ifboth 4567 |
. . . . . . . . . 10
β’ (((π / (π + π‘)) < 1 β§ (1 / 2) < 1) β if((1
/ 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1) |
100 | 95, 96, 99 | sylancl 587 |
. . . . . . . . 9
β’ ((π β§ π‘ β β+) β if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1) |
101 | | 1xr 11270 |
. . . . . . . . . 10
β’ 1 β
β* |
102 | | elioo2 13362 |
. . . . . . . . . 10
β’ ((0
β β* β§ 1 β β*) β (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β (0(,)1) β (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β β β§ 0 <
if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β§ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1))) |
103 | 22, 101, 102 | mp2an 691 |
. . . . . . . . 9
β’ (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β (0(,)1) β (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β β β§ 0 <
if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β§ if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) < 1)) |
104 | 66, 89, 100, 103 | syl3anbrc 1344 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) β (0(,)1)) |
105 | 8 | adantr 482 |
. . . . . . . 8
β’ ((π β§ π‘ β β+) β π βr β€ πΊ) |
106 | | fveq2 6889 |
. . . . . . . . . . . 12
β’ (π¦ = π₯ β (πβπ¦) = (πβπ₯)) |
107 | 106 | oveq2d 7422 |
. . . . . . . . . . 11
β’ (π¦ = π₯ β (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ¦)) = (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ₯))) |
108 | | fveq2 6889 |
. . . . . . . . . . 11
β’ (π¦ = π₯ β ((πΉβπ)βπ¦) = ((πΉβπ)βπ₯)) |
109 | 107, 108 | breq12d 5161 |
. . . . . . . . . 10
β’ (π¦ = π₯ β ((if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ¦)) β€ ((πΉβπ)βπ¦) β (if((1 / 2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ₯)) β€ ((πΉβπ)βπ₯))) |
110 | 109 | cbvrabv 3443 |
. . . . . . . . 9
β’ {π¦ β β β£ (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ¦)) β€ ((πΉβπ)βπ¦)} = {π₯ β β β£ (if((1 / 2) β€
(π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ₯)) β€ ((πΉβπ)βπ₯)} |
111 | 110 | mpteq2i 5253 |
. . . . . . . 8
β’ (π β β β¦ {π¦ β β β£ (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ¦)) β€ ((πΉβπ)βπ¦)}) = (π β β β¦ {π₯ β β β£ (if((1 / 2) β€
(π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β· (πβπ₯)) β€ ((πΉβπ)βπ₯)}) |
112 | 1, 80, 81, 82, 83, 6, 104, 13, 105, 11, 111 | itg2monolem1 25260 |
. . . . . . 7
β’ ((π β§ π‘ β β+) β (if((1 /
2) β€ (π / (π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ)) β€ π) |
113 | 63, 67, 11, 79, 112 | letrd 11368 |
. . . . . 6
β’ ((π β§ π‘ β β+) β ((π / (π + π‘)) Β· (β«1βπ)) β€ π) |
114 | 61, 113 | eqbrtrd 5170 |
. . . . 5
β’ ((π β§ π‘ β β+) β ((π Β·
(β«1βπ)) / (π + π‘)) β€ π) |
115 | 11, 15 | remulcld 11241 |
. . . . . 6
β’ ((π β§ π‘ β β+) β (π Β·
(β«1βπ)) β β) |
116 | | ledivmul2 12090 |
. . . . . 6
β’ (((π Β·
(β«1βπ)) β β β§ π β β β§ ((π + π‘) β β β§ 0 < (π + π‘))) β (((π Β· (β«1βπ)) / (π + π‘)) β€ π β (π Β· (β«1βπ)) β€ (π Β· (π + π‘)))) |
117 | 115, 11, 19, 59, 116 | syl112anc 1375 |
. . . . 5
β’ ((π β§ π‘ β β+) β (((π Β·
(β«1βπ)) / (π + π‘)) β€ π β (π Β· (β«1βπ)) β€ (π Β· (π + π‘)))) |
118 | 114, 117 | mpbid 231 |
. . . 4
β’ ((π β§ π‘ β β+) β (π Β·
(β«1βπ)) β€ (π Β· (π + π‘))) |
119 | 66, 15, 89, 76 | mulgt0d 11366 |
. . . . . 6
β’ ((π β§ π‘ β β+) β 0 <
(if((1 / 2) β€ (π /
(π + π‘)), (π / (π + π‘)), (1 / 2)) Β·
(β«1βπ))) |
120 | 21, 67, 11, 119, 112 | ltletrd 11371 |
. . . . 5
β’ ((π β§ π‘ β β+) β 0 <
π) |
121 | | lemul2 12064 |
. . . . 5
β’
(((β«1βπ) β β β§ (π + π‘) β β β§ (π β β β§ 0 < π)) β
((β«1βπ) β€ (π + π‘) β (π Β· (β«1βπ)) β€ (π Β· (π + π‘)))) |
122 | 15, 19, 11, 120, 121 | syl112anc 1375 |
. . . 4
β’ ((π β§ π‘ β β+) β
((β«1βπ) β€ (π + π‘) β (π Β· (β«1βπ)) β€ (π Β· (π + π‘)))) |
123 | 118, 122 | mpbird 257 |
. . 3
β’ ((π β§ π‘ β β+) β
(β«1βπ)
β€ (π + π‘)) |
124 | 123 | ralrimiva 3147 |
. 2
β’ (π β βπ‘ β β+
(β«1βπ)
β€ (π + π‘)) |
125 | | alrple 13182 |
. . 3
β’
(((β«1βπ) β β β§ π β β) β
((β«1βπ) β€ π β βπ‘ β β+
(β«1βπ)
β€ (π + π‘))) |
126 | 70, 10, 125 | syl2anc 585 |
. 2
β’ (π β
((β«1βπ) β€ π β βπ‘ β β+
(β«1βπ)
β€ (π + π‘))) |
127 | 124, 126 | mpbird 257 |
1
β’ (π β
(β«1βπ)
β€ π) |