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Mirrors > Home > MPE Home > Th. List > log2le1 | Structured version Visualization version GIF version |
Description: log2 is less than 1. This is just a weaker form of log2ub 26109 when no tight upper bound is required. (Contributed by Thierry Arnoux, 27-Sep-2017.) |
Ref | Expression |
---|---|
log2le1 | ⊢ (log‘2) < 1 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | log2ub 26109 | . 2 ⊢ (log‘2) < (;;253 / ;;365) | |
2 | 2nn0 12260 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
3 | 3nn0 12261 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
4 | 5nn0 12263 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
5 | 6nn0 12264 | . . . . 5 ⊢ 6 ∈ ℕ0 | |
6 | 2lt3 12155 | . . . . 5 ⊢ 2 < 3 | |
7 | 5lt10 12582 | . . . . 5 ⊢ 5 < ;10 | |
8 | 3lt10 12584 | . . . . 5 ⊢ 3 < ;10 | |
9 | 2, 3, 4, 5, 3, 4, 6, 7, 8 | 3decltc 12480 | . . . 4 ⊢ ;;253 < ;;365 |
10 | 2, 4 | deccl 12462 | . . . . . . 7 ⊢ ;25 ∈ ℕ0 |
11 | 10, 3 | deccl 12462 | . . . . . 6 ⊢ ;;253 ∈ ℕ0 |
12 | 11 | nn0rei 12254 | . . . . 5 ⊢ ;;253 ∈ ℝ |
13 | 3, 5 | deccl 12462 | . . . . . . 7 ⊢ ;36 ∈ ℕ0 |
14 | 13, 4 | deccl 12462 | . . . . . 6 ⊢ ;;365 ∈ ℕ0 |
15 | 14 | nn0rei 12254 | . . . . 5 ⊢ ;;365 ∈ ℝ |
16 | 6nn 12072 | . . . . . . 7 ⊢ 6 ∈ ℕ | |
17 | 3, 16 | decnncl 12467 | . . . . . 6 ⊢ ;36 ∈ ℕ |
18 | 0nn0 12258 | . . . . . 6 ⊢ 0 ∈ ℕ0 | |
19 | 10pos 12464 | . . . . . 6 ⊢ 0 < ;10 | |
20 | 17, 4, 18, 19 | declti 12485 | . . . . 5 ⊢ 0 < ;;365 |
21 | 12, 15, 15, 20 | ltdiv1ii 11914 | . . . 4 ⊢ (;;253 < ;;365 ↔ (;;253 / ;;365) < (;;365 / ;;365)) |
22 | 9, 21 | mpbi 229 | . . 3 ⊢ (;;253 / ;;365) < (;;365 / ;;365) |
23 | 15 | recni 10999 | . . . 4 ⊢ ;;365 ∈ ℂ |
24 | 0re 10987 | . . . . 5 ⊢ 0 ∈ ℝ | |
25 | 24, 20 | gtneii 11097 | . . . 4 ⊢ ;;365 ≠ 0 |
26 | 23, 25 | dividi 11718 | . . 3 ⊢ (;;365 / ;;365) = 1 |
27 | 22, 26 | breqtri 5098 | . 2 ⊢ (;;253 / ;;365) < 1 |
28 | 2rp 12745 | . . . 4 ⊢ 2 ∈ ℝ+ | |
29 | relogcl 25741 | . . . 4 ⊢ (2 ∈ ℝ+ → (log‘2) ∈ ℝ) | |
30 | 28, 29 | ax-mp 5 | . . 3 ⊢ (log‘2) ∈ ℝ |
31 | 12, 15, 25 | redivcli 11752 | . . 3 ⊢ (;;253 / ;;365) ∈ ℝ |
32 | 1re 10985 | . . 3 ⊢ 1 ∈ ℝ | |
33 | 30, 31, 32 | lttri 11111 | . 2 ⊢ (((log‘2) < (;;253 / ;;365) ∧ (;;253 / ;;365) < 1) → (log‘2) < 1) |
34 | 1, 27, 33 | mp2an 689 | 1 ⊢ (log‘2) < 1 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2106 class class class wbr 5073 ‘cfv 6426 (class class class)co 7267 ℝcr 10880 0cc0 10881 1c1 10882 < clt 11019 / cdiv 11642 2c2 12038 3c3 12039 5c5 12041 6c6 12042 ;cdc 12447 ℝ+crp 12740 logclog 25720 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5208 ax-sep 5221 ax-nul 5228 ax-pow 5286 ax-pr 5350 ax-un 7578 ax-inf2 9386 ax-cnex 10937 ax-resscn 10938 ax-1cn 10939 ax-icn 10940 ax-addcl 10941 ax-addrcl 10942 ax-mulcl 10943 ax-mulrcl 10944 ax-mulcom 10945 ax-addass 10946 ax-mulass 10947 ax-distr 10948 ax-i2m1 10949 ax-1ne0 10950 ax-1rid 10951 ax-rnegex 10952 ax-rrecex 10953 ax-cnre 10954 ax-pre-lttri 10955 ax-pre-lttrn 10956 ax-pre-ltadd 10957 ax-pre-mulgt0 10958 ax-pre-sup 10959 ax-addf 10960 ax-mulf 10961 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-nel 3050 df-ral 3069 df-rex 3070 df-reu 3071 df-rmo 3072 df-rab 3073 df-v 3431 df-sbc 3716 df-csb 3832 df-dif 3889 df-un 3891 df-in 3893 df-ss 3903 df-pss 3905 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-tp 4566 df-op 4568 df-uni 4840 df-int 4880 df-iun 4926 df-iin 4927 df-br 5074 df-opab 5136 df-mpt 5157 df-tr 5191 df-id 5484 df-eprel 5490 df-po 5498 df-so 5499 df-fr 5539 df-se 5540 df-we 5541 df-xp 5590 df-rel 5591 df-cnv 5592 df-co 5593 df-dm 5594 df-rn 5595 df-res 5596 df-ima 5597 df-pred 6195 df-ord 6262 df-on 6263 df-lim 6264 df-suc 6265 df-iota 6384 df-fun 6428 df-fn 6429 df-f 6430 df-f1 6431 df-fo 6432 df-f1o 6433 df-fv 6434 df-isom 6435 df-riota 7224 df-ov 7270 df-oprab 7271 df-mpo 7272 df-of 7523 df-om 7703 df-1st 7820 df-2nd 7821 df-supp 7965 df-frecs 8084 df-wrecs 8115 df-recs 8189 df-rdg 8228 df-1o 8284 df-2o 8285 df-oadd 8288 df-er 8485 df-map 8604 df-pm 8605 df-ixp 8673 df-en 8721 df-dom 8722 df-sdom 8723 df-fin 8724 df-fsupp 9116 df-fi 9157 df-sup 9188 df-inf 9189 df-oi 9256 df-card 9707 df-pnf 11021 df-mnf 11022 df-xr 11023 df-ltxr 11024 df-le 11025 df-sub 11217 df-neg 11218 df-div 11643 df-nn 11984 df-2 12046 df-3 12047 df-4 12048 df-5 12049 df-6 12050 df-7 12051 df-8 12052 df-9 12053 df-n0 12244 df-xnn0 12316 df-z 12330 df-dec 12448 df-uz 12593 df-q 12699 df-rp 12741 df-xneg 12858 df-xadd 12859 df-xmul 12860 df-ioo 13093 df-ioc 13094 df-ico 13095 df-icc 13096 df-fz 13250 df-fzo 13393 df-fl 13522 df-mod 13600 df-seq 13732 df-exp 13793 df-fac 13998 df-bc 14027 df-hash 14055 df-shft 14788 df-cj 14820 df-re 14821 df-im 14822 df-sqrt 14956 df-abs 14957 df-limsup 15190 df-clim 15207 df-rlim 15208 df-sum 15408 df-ef 15787 df-sin 15789 df-cos 15790 df-tan 15791 df-pi 15792 df-dvds 15974 df-struct 16858 df-sets 16875 df-slot 16893 df-ndx 16905 df-base 16923 df-ress 16952 df-plusg 16985 df-mulr 16986 df-starv 16987 df-sca 16988 df-vsca 16989 df-ip 16990 df-tset 16991 df-ple 16992 df-ds 16994 df-unif 16995 df-hom 16996 df-cco 16997 df-rest 17143 df-topn 17144 df-0g 17162 df-gsum 17163 df-topgen 17164 df-pt 17165 df-prds 17168 df-xrs 17223 df-qtop 17228 df-imas 17229 df-xps 17231 df-mre 17305 df-mrc 17306 df-acs 17308 df-mgm 18336 df-sgrp 18385 df-mnd 18396 df-submnd 18441 df-mulg 18711 df-cntz 18933 df-cmn 19398 df-psmet 20599 df-xmet 20600 df-met 20601 df-bl 20602 df-mopn 20603 df-fbas 20604 df-fg 20605 df-cnfld 20608 df-top 22053 df-topon 22070 df-topsp 22092 df-bases 22106 df-cld 22180 df-ntr 22181 df-cls 22182 df-nei 22259 df-lp 22297 df-perf 22298 df-cn 22388 df-cnp 22389 df-haus 22476 df-cmp 22548 df-tx 22723 df-hmeo 22916 df-fil 23007 df-fm 23099 df-flim 23100 df-flf 23101 df-xms 23483 df-ms 23484 df-tms 23485 df-cncf 24051 df-limc 25040 df-dv 25041 df-ulm 25546 df-log 25722 df-atan 26027 |
This theorem is referenced by: emgt0 26166 hgt750lemd 32636 |
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