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Mirrors > Home > MPE Home > Th. List > Mathboxes > digvalnn0 | Structured version Visualization version GIF version |
Description: The πΎ th digit of a nonnegative real number π in the positional system with base π΅ is a nonnegative integer. (Contributed by AV, 28-May-2020.) |
Ref | Expression |
---|---|
digvalnn0 | β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β (πΎ(digitβπ΅)π ) β β0) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | digval 47372 | . 2 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β (πΎ(digitβπ΅)π ) = ((ββ((π΅β-πΎ) Β· π )) mod π΅)) | |
2 | nnre 12224 | . . . . . . 7 β’ (π΅ β β β π΅ β β) | |
3 | 2 | 3ad2ant1 1132 | . . . . . 6 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β π΅ β β) |
4 | nnne0 12251 | . . . . . . 7 β’ (π΅ β β β π΅ β 0) | |
5 | 4 | 3ad2ant1 1132 | . . . . . 6 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β π΅ β 0) |
6 | znegcl 12602 | . . . . . . 7 β’ (πΎ β β€ β -πΎ β β€) | |
7 | 6 | 3ad2ant2 1133 | . . . . . 6 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β -πΎ β β€) |
8 | 3, 5, 7 | reexpclzd 14217 | . . . . 5 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β (π΅β-πΎ) β β) |
9 | elrege0 13436 | . . . . . . 7 β’ (π β (0[,)+β) β (π β β β§ 0 β€ π )) | |
10 | 9 | simplbi 497 | . . . . . 6 β’ (π β (0[,)+β) β π β β) |
11 | 10 | 3ad2ant3 1134 | . . . . 5 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β π β β) |
12 | 8, 11 | remulcld 11249 | . . . 4 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β ((π΅β-πΎ) Β· π ) β β) |
13 | 12 | flcld 13768 | . . 3 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β (ββ((π΅β-πΎ) Β· π )) β β€) |
14 | simp1 1135 | . . 3 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β π΅ β β) | |
15 | 13, 14 | zmodcld 13862 | . 2 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β ((ββ((π΅β-πΎ) Β· π )) mod π΅) β β0) |
16 | 1, 15 | eqeltrd 2832 | 1 β’ ((π΅ β β β§ πΎ β β€ β§ π β (0[,)+β)) β (πΎ(digitβπ΅)π ) β β0) |
Colors of variables: wff setvar class |
Syntax hints: β wi 4 β§ w3a 1086 β wcel 2105 β wne 2939 class class class wbr 5148 βcfv 6543 (class class class)co 7412 βcr 11113 0cc0 11114 Β· cmul 11119 +βcpnf 11250 β€ cle 11254 -cneg 11450 βcn 12217 β0cn0 12477 β€cz 12563 [,)cico 13331 βcfl 13760 mod cmo 13839 βcexp 14032 digitcdig 47369 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1912 ax-6 1970 ax-7 2010 ax-8 2107 ax-9 2115 ax-10 2136 ax-11 2153 ax-12 2170 ax-ext 2702 ax-rep 5285 ax-sep 5299 ax-nul 5306 ax-pow 5363 ax-pr 5427 ax-un 7729 ax-cnex 11170 ax-resscn 11171 ax-1cn 11172 ax-icn 11173 ax-addcl 11174 ax-addrcl 11175 ax-mulcl 11176 ax-mulrcl 11177 ax-mulcom 11178 ax-addass 11179 ax-mulass 11180 ax-distr 11181 ax-i2m1 11182 ax-1ne0 11183 ax-1rid 11184 ax-rnegex 11185 ax-rrecex 11186 ax-cnre 11187 ax-pre-lttri 11188 ax-pre-lttrn 11189 ax-pre-ltadd 11190 ax-pre-mulgt0 11191 ax-pre-sup 11192 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 845 df-3or 1087 df-3an 1088 df-tru 1543 df-fal 1553 df-ex 1781 df-nf 1785 df-sb 2067 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-nfc 2884 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rmo 3375 df-reu 3376 df-rab 3432 df-v 3475 df-sbc 3778 df-csb 3894 df-dif 3951 df-un 3953 df-in 3955 df-ss 3965 df-pss 3967 df-nul 4323 df-if 4529 df-pw 4604 df-sn 4629 df-pr 4631 df-op 4635 df-uni 4909 df-iun 4999 df-br 5149 df-opab 5211 df-mpt 5232 df-tr 5266 df-id 5574 df-eprel 5580 df-po 5588 df-so 5589 df-fr 5631 df-we 5633 df-xp 5682 df-rel 5683 df-cnv 5684 df-co 5685 df-dm 5686 df-rn 5687 df-res 5688 df-ima 5689 df-pred 6300 df-ord 6367 df-on 6368 df-lim 6369 df-suc 6370 df-iota 6495 df-fun 6545 df-fn 6546 df-f 6547 df-f1 6548 df-fo 6549 df-f1o 6550 df-fv 6551 df-riota 7368 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7860 df-1st 7979 df-2nd 7980 df-frecs 8270 df-wrecs 8301 df-recs 8375 df-rdg 8414 df-er 8707 df-en 8944 df-dom 8945 df-sdom 8946 df-sup 9441 df-inf 9442 df-pnf 11255 df-mnf 11256 df-xr 11257 df-ltxr 11258 df-le 11259 df-sub 11451 df-neg 11452 df-div 11877 df-nn 12218 df-n0 12478 df-z 12564 df-uz 12828 df-rp 12980 df-ico 13335 df-fl 13762 df-mod 13840 df-seq 13972 df-exp 14033 df-dig 47370 |
This theorem is referenced by: nn0sumshdiglemA 47393 nn0sumshdiglemB 47394 nn0sumshdiglem2 47396 nn0mullong 47399 |
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