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Some folks might think: “you still use RCS”?!? And we will say, hey, at least we switched from SCCS to RCS back in … I think it was around 1994 ... at least we are keeping up! :-) :-) :-) Logs say that SCCS version 18 became RCS version 19 on 1994 March 18. RCS served us well. But now it is time to move on. And so we are switching to git. Calc releases produce a lot of file changes. In the 125 releases of calc since 1996, when I started managing calc releases, there have been 15473 file mods!
64 lines
1.9 KiB
Plaintext
64 lines
1.9 KiB
Plaintext
NAME
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bernoulli - Bernoulli number
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SYNOPSIS
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bernoulli(n)
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TYPES
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n integer, n < 2^31 if even
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return rational
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DESCRIPTION
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Returns the Bernoulli number with index n, i.e. the coefficient B_n in
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the expansion
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t/(exp(t) - 1) = Sum B_n * t^n/n!
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bernoulli(n) is zero both for n < 0 and for n odd and > 2.
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When bernoulli(n) is computed for positive even n, the values for
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n and smaller positive even indices are stored in a table so that
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a later call to bernoulli(k) with 0 <= k < n will be executed quickly.
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Considerable runtime and memory are required for calculating
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bernoulli(n) for large even n. For n = 1000, the numerator has
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1779 digits, the denominator 9 digits.
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The memory used to store calculated bernoulli numbers is freed by
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freebernoulli().
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EXAMPLE
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; config("mode", "frac"),;
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; for (n = 0; n <= 6; n++) print bernoulli(n),; print;
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1 -1/2 1/6 0 -1/30 0 1/42
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LIMITS
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n < 2^31-1
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LIBRARY
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NUMBER *qbernoulli(long n)
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SEE ALSO
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euler, catalan, comb, fact, perm
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## Copyright (C) 2000 Ernest Bowen
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##
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## Calc is open software; you can redistribute it and/or modify it under
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## the terms of the version 2.1 of the GNU Lesser General Public License
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## as published by the Free Software Foundation.
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##
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## Calc is distributed in the hope that it will be useful, but WITHOUT
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## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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## or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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## Public License for more details.
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##
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## A copy of version 2.1 of the GNU Lesser General Public License is
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## distributed with calc under the filename COPYING-LGPL. You should have
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## received a copy with calc; if not, write to Free Software Foundation, Inc.
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## 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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##
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## Under source code control: 2000/07/13 01:33:00
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## File existed as early as: 2000
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##
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## Share and enjoy! :-) http://www.isthe.com/chongo/tech/comp/calc/
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