1Math::NumSeq::SqrtDigitUss(e3r)Contributed Perl DocumentMaattiho:n:NumSeq::SqrtDigits(3)
2
3
4

NAME

6       Math::NumSeq::SqrtDigits -- the digits of a square root
7

SYNOPSIS

9        use Math::NumSeq::SqrtDigits;
10        my $seq = Math::NumSeq::SqrtDigits->new (sqrt => 7);
11        my ($i, $value) = $seq->next;
12

DESCRIPTION

14       The sequence of digits which are the square root of a given radicand.
15       For example sqrt(2) in decimal 1, 4, 1, 4, 2, 1, etc, being 1.41421
16       etc.
17
18       The default is decimal, or a "radix" can be given.  In the current code
19       "Math::BigInt" is used.  (For radix 2, 8 and 10 the specific digit
20       conversion methods in BigInt are used, which might be faster than the
21       general case.)
22

FUNCTIONS

24       See "FUNCTIONS" in Math::NumSeq for behaviour common to all sequence
25       classes.
26
27       "$seq = Math::NumSeq::SqrtDigits->new (sqrt => $s)"
28       "$seq = Math::NumSeq::SqrtDigits->new (sqrt => $s, radix => $r)"
29           Create and return a new sequence object giving the digits of
30           "sqrt($s)".
31
32       "$bool = $seq->pred($value)"
33           Return true if $value might occurs as a digit in the square root.
34
35           Currently this presumes all digits occur, so simply "$value >= 0"
36           and "$value < $radix".  For a perfect square this might be wrong,
37           for a non-square do all digits in fact occur?
38

BUGS

40       The current code requires "Math::BigInt" "bsqrt()", which may mean
41       BigInt 1.60 or higher (which comes with Perl 5.8.0 and up).
42

SEE ALSO

44       Math::NumSeq, Math::NumSeq::SqrtEngel, Math::NumSeq::FractionDigits
45
46       Norman L. de Forest, "The Square Root of 4 to a Million Places", at
47       Project Gutenberg, <http://www.gutenberg.org/ebooks/3651>
48

HOME PAGE

50       <http://user42.tuxfamily.org/math-numseq/index.html>
51

LICENSE

53       Copyright 2010, 2011, 2012, 2013, 2014, 2015 Kevin Ryde
54
55       Math-NumSeq is free software; you can redistribute it and/or modify it
56       under the terms of the GNU General Public License as published by the
57       Free Software Foundation; either version 3, or (at your option) any
58       later version.
59
60       Math-NumSeq is distributed in the hope that it will be useful, but
61       WITHOUT ANY WARRANTY; without even the implied warranty of
62       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
63       General Public License for more details.
64
65       You should have received a copy of the GNU General Public License along
66       with Math-NumSeq.  If not, see <http://www.gnu.org/licenses/>.
67
68
69
70perl v5.28.0                      2015-03-26       Math::NumSeq::SqrtDigits(3)
Impressum