MATH-MISC(1) MATH-MISC(1)
NAME
ack, crackerbarrel, factor, fibonacci, fit, genprimes,
mersenne, parts, perms, pi, powers, primes, sieve -
miscellaneous mathematical applications
SYNOPSIS
math/ack [ m ] [ n ]
math/crackerbarrel [ n ]
math/factor [ n ]
math/fibonacci
math/fit [ -ddeg ] [ -v ] [ file ]
math/genprimes [ lim ]
math/mersenne [ num ]
math/parts [ -a ] [ num... ]
math/perms [ n ]
math/pi [ dp ]
math/powers [ -p num ] [ -n num ] [ -f num ] [ -l num ] [ -m
num ] [ -v ]
math/primes [ m ] [ n ]
math/sieve [ -a alg ] [ lim ]
DESCRIPTION
A collection of simple mathematical utilities.
math/ack
Calculates and times Ackermann's function A(m, n).
math/crackerbarrel
Solves the crackerbarrel puzzle n times and outputs the
time taken. See the source for details of the puzzle.
math/factor
Factors the number n.
math/fibonacci
Generates the first few terms of the Fibonacci series
using recursion and user defined exceptions.
math/fit
Fits a polynomial of degree deg to a set of points (x,
y) where x is the independent variable, y the dependent
one. All x and y values should be seperated by white
space and can be real or integer. The values are read
from file or standard input if none is given. The -v
option prints a table of actual and expected y values.
math/genprimes
Generates primes numbers up to and including lim using
spawned processes and buffered channels.
Page 1 Plan 9 (printed 12/21/24)
MATH-MISC(1) MATH-MISC(1)
math/mersenne
Tests the primality of the Mersenne numbers ie numbers
of the form 2^n-1. The argument num is the power of 2
in the above.
math/parts
Calculates the number of partitions of the given
number(s). The -a option will print out a table of the
number of partitions of all numbers up to the given
number(s).
math/perms
Prints out all permutations of n elements.
math/pi
Calculates the value of pi to dp decimal places.
math/powers
Investigates the number of representations of an inte-
ger as a sum of powers. The -p option denotes the
power of use (default 2). The -n option denotes the
number of powers to sum (default 2). The -f option
denotes the minimum number of such representations
found before reporting them (default 2). The -l and -m
options denote the smallest and largest numbers to con-
sider respectively (defaults 0 and 8192). Finally the
-v option prints various statistics during the search.
math/primes
Prints out all primes between m and n .
math/sieve
Prints out prime numbers up to lim using a sieve algo-
rithm. The -a option indicates the level of sophistica-
tion of the algorithm (0-4).
EXAMPLE
math/powers -p 3 -m 30000
gives
[2] 1729 = 1**3 + 12**3 = 9**3 + 10**3
[2] 4104 = 2**3 + 16**3 = 9**3 + 15**3
[2] 20683 = 10**3 + 27**3 = 19**3 + 24**3
The number of representations found for each integer is indicated in
square brackets.
SOURCE
/appl/math/ack.b
/appl/math/crackerbarrel.b
/appl/math/factor.b
/appl/math/fibonacci.b
/appl/math/fit.b
/appl/math/genprimes.b
Page 2 Plan 9 (printed 12/21/24)
MATH-MISC(1) MATH-MISC(1)
/appl/math/mersenne.b
/appl/math/parts.b
/appl/math/perms.b
/appl/math/pi.b
/appl/math/powers.b
/appl/math/primes.b
/appl/math/sieve.b
Page 3 Plan 9 (printed 12/21/24)