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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 26148 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 26148 | . 2 ⊢ (log‘2) < (;;253 / ;;365) | |
2 | 2nn0 12300 | . . . . 5 ⊢ 2 ∈ ℕ0 | |
3 | 3nn0 12301 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
4 | 5nn0 12303 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
5 | 6nn0 12304 | . . . . 5 ⊢ 6 ∈ ℕ0 | |
6 | 2lt3 12195 | . . . . 5 ⊢ 2 < 3 | |
7 | 5lt10 12622 | . . . . 5 ⊢ 5 < ;10 | |
8 | 3lt10 12624 | . . . . 5 ⊢ 3 < ;10 | |
9 | 2, 3, 4, 5, 3, 4, 6, 7, 8 | 3decltc 12520 | . . . 4 ⊢ ;;253 < ;;365 |
10 | 2, 4 | deccl 12502 | . . . . . . 7 ⊢ ;25 ∈ ℕ0 |
11 | 10, 3 | deccl 12502 | . . . . . 6 ⊢ ;;253 ∈ ℕ0 |
12 | 11 | nn0rei 12294 | . . . . 5 ⊢ ;;253 ∈ ℝ |
13 | 3, 5 | deccl 12502 | . . . . . . 7 ⊢ ;36 ∈ ℕ0 |
14 | 13, 4 | deccl 12502 | . . . . . 6 ⊢ ;;365 ∈ ℕ0 |
15 | 14 | nn0rei 12294 | . . . . 5 ⊢ ;;365 ∈ ℝ |
16 | 6nn 12112 | . . . . . . 7 ⊢ 6 ∈ ℕ | |
17 | 3, 16 | decnncl 12507 | . . . . . 6 ⊢ ;36 ∈ ℕ |
18 | 0nn0 12298 | . . . . . 6 ⊢ 0 ∈ ℕ0 | |
19 | 10pos 12504 | . . . . . 6 ⊢ 0 < ;10 | |
20 | 17, 4, 18, 19 | declti 12525 | . . . . 5 ⊢ 0 < ;;365 |
21 | 12, 15, 15, 20 | ltdiv1ii 11954 | . . . 4 ⊢ (;;253 < ;;365 ↔ (;;253 / ;;365) < (;;365 / ;;365)) |
22 | 9, 21 | mpbi 229 | . . 3 ⊢ (;;253 / ;;365) < (;;365 / ;;365) |
23 | 15 | recni 11039 | . . . 4 ⊢ ;;365 ∈ ℂ |
24 | 0re 11027 | . . . . 5 ⊢ 0 ∈ ℝ | |
25 | 24, 20 | gtneii 11137 | . . . 4 ⊢ ;;365 ≠ 0 |
26 | 23, 25 | dividi 11758 | . . 3 ⊢ (;;365 / ;;365) = 1 |
27 | 22, 26 | breqtri 5106 | . 2 ⊢ (;;253 / ;;365) < 1 |
28 | 2rp 12785 | . . . 4 ⊢ 2 ∈ ℝ+ | |
29 | relogcl 25780 | . . . 4 ⊢ (2 ∈ ℝ+ → (log‘2) ∈ ℝ) | |
30 | 28, 29 | ax-mp 5 | . . 3 ⊢ (log‘2) ∈ ℝ |
31 | 12, 15, 25 | redivcli 11792 | . . 3 ⊢ (;;253 / ;;365) ∈ ℝ |
32 | 1re 11025 | . . 3 ⊢ 1 ∈ ℝ | |
33 | 30, 31, 32 | lttri 11151 | . 2 ⊢ (((log‘2) < (;;253 / ;;365) ∧ (;;253 / ;;365) < 1) → (log‘2) < 1) |
34 | 1, 27, 33 | mp2an 690 | 1 ⊢ (log‘2) < 1 |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2104 class class class wbr 5081 ‘cfv 6458 (class class class)co 7307 ℝcr 10920 0cc0 10921 1c1 10922 < clt 11059 / cdiv 11682 2c2 12078 3c3 12079 5c5 12081 6c6 12082 ;cdc 12487 ℝ+crp 12780 logclog 25759 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1795 ax-4 1809 ax-5 1911 ax-6 1969 ax-7 2009 ax-8 2106 ax-9 2114 ax-10 2135 ax-11 2152 ax-12 2169 ax-ext 2707 ax-rep 5218 ax-sep 5232 ax-nul 5239 ax-pow 5297 ax-pr 5361 ax-un 7620 ax-inf2 9447 ax-cnex 10977 ax-resscn 10978 ax-1cn 10979 ax-icn 10980 ax-addcl 10981 ax-addrcl 10982 ax-mulcl 10983 ax-mulrcl 10984 ax-mulcom 10985 ax-addass 10986 ax-mulass 10987 ax-distr 10988 ax-i2m1 10989 ax-1ne0 10990 ax-1rid 10991 ax-rnegex 10992 ax-rrecex 10993 ax-cnre 10994 ax-pre-lttri 10995 ax-pre-lttrn 10996 ax-pre-ltadd 10997 ax-pre-mulgt0 10998 ax-pre-sup 10999 ax-addf 11000 ax-mulf 11001 |
This theorem depends on definitions: df-bi 206 df-an 398 df-or 846 df-3or 1088 df-3an 1089 df-tru 1542 df-fal 1552 df-ex 1780 df-nf 1784 df-sb 2066 df-mo 2538 df-eu 2567 df-clab 2714 df-cleq 2728 df-clel 2814 df-nfc 2887 df-ne 2942 df-nel 3048 df-ral 3063 df-rex 3072 df-rmo 3304 df-reu 3305 df-rab 3306 df-v 3439 df-sbc 3722 df-csb 3838 df-dif 3895 df-un 3897 df-in 3899 df-ss 3909 df-pss 3911 df-nul 4263 df-if 4466 df-pw 4541 df-sn 4566 df-pr 4568 df-tp 4570 df-op 4572 df-uni 4845 df-int 4887 df-iun 4933 df-iin 4934 df-br 5082 df-opab 5144 df-mpt 5165 df-tr 5199 df-id 5500 df-eprel 5506 df-po 5514 df-so 5515 df-fr 5555 df-se 5556 df-we 5557 df-xp 5606 df-rel 5607 df-cnv 5608 df-co 5609 df-dm 5610 df-rn 5611 df-res 5612 df-ima 5613 df-pred 6217 df-ord 6284 df-on 6285 df-lim 6286 df-suc 6287 df-iota 6410 df-fun 6460 df-fn 6461 df-f 6462 df-f1 6463 df-fo 6464 df-f1o 6465 df-fv 6466 df-isom 6467 df-riota 7264 df-ov 7310 df-oprab 7311 df-mpo 7312 df-of 7565 df-om 7745 df-1st 7863 df-2nd 7864 df-supp 8009 df-frecs 8128 df-wrecs 8159 df-recs 8233 df-rdg 8272 df-1o 8328 df-2o 8329 df-oadd 8332 df-er 8529 df-map 8648 df-pm 8649 df-ixp 8717 df-en 8765 df-dom 8766 df-sdom 8767 df-fin 8768 df-fsupp 9177 df-fi 9218 df-sup 9249 df-inf 9250 df-oi 9317 df-card 9745 df-pnf 11061 df-mnf 11062 df-xr 11063 df-ltxr 11064 df-le 11065 df-sub 11257 df-neg 11258 df-div 11683 df-nn 12024 df-2 12086 df-3 12087 df-4 12088 df-5 12089 df-6 12090 df-7 12091 df-8 12092 df-9 12093 df-n0 12284 df-xnn0 12356 df-z 12370 df-dec 12488 df-uz 12633 df-q 12739 df-rp 12781 df-xneg 12898 df-xadd 12899 df-xmul 12900 df-ioo 13133 df-ioc 13134 df-ico 13135 df-icc 13136 df-fz 13290 df-fzo 13433 df-fl 13562 df-mod 13640 df-seq 13772 df-exp 13833 df-fac 14038 df-bc 14067 df-hash 14095 df-shft 14827 df-cj 14859 df-re 14860 df-im 14861 df-sqrt 14995 df-abs 14996 df-limsup 15229 df-clim 15246 df-rlim 15247 df-sum 15447 df-ef 15826 df-sin 15828 df-cos 15829 df-tan 15830 df-pi 15831 df-dvds 16013 df-struct 16897 df-sets 16914 df-slot 16932 df-ndx 16944 df-base 16962 df-ress 16991 df-plusg 17024 df-mulr 17025 df-starv 17026 df-sca 17027 df-vsca 17028 df-ip 17029 df-tset 17030 df-ple 17031 df-ds 17033 df-unif 17034 df-hom 17035 df-cco 17036 df-rest 17182 df-topn 17183 df-0g 17201 df-gsum 17202 df-topgen 17203 df-pt 17204 df-prds 17207 df-xrs 17262 df-qtop 17267 df-imas 17268 df-xps 17270 df-mre 17344 df-mrc 17345 df-acs 17347 df-mgm 18375 df-sgrp 18424 df-mnd 18435 df-submnd 18480 df-mulg 18750 df-cntz 18972 df-cmn 19437 df-psmet 20638 df-xmet 20639 df-met 20640 df-bl 20641 df-mopn 20642 df-fbas 20643 df-fg 20644 df-cnfld 20647 df-top 22092 df-topon 22109 df-topsp 22131 df-bases 22145 df-cld 22219 df-ntr 22220 df-cls 22221 df-nei 22298 df-lp 22336 df-perf 22337 df-cn 22427 df-cnp 22428 df-haus 22515 df-cmp 22587 df-tx 22762 df-hmeo 22955 df-fil 23046 df-fm 23138 df-flim 23139 df-flf 23140 df-xms 23522 df-ms 23523 df-tms 23524 df-cncf 24090 df-limc 25079 df-dv 25080 df-ulm 25585 df-log 25761 df-atan 26066 |
This theorem is referenced by: emgt0 26205 hgt750lemd 32677 |
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