Table of Contents
mathomatic - a computer algebra system
rmath - a computer algebra system with functions
mathomatic [ -bchqrtuvwx
] [ -s level ] [ -m number ] [ input_files ]
rmath [ input_files ]
Mathomatic is a general-purpose computer
algebra system (CAS) that can symbolically solve, simplify, combine, and
compare algebraic equations, perform complex number and polynomial arithmetic,
etc. It does some calculus and handles all elementary algebra, except logarithms.
Plotting expressions with gnuplot is also supported.
mathomatic is the
main Mathomatic application that does interactive symbolic-numeric mathematics
through a command-line interface. The numerical arithmetic is double precision
floating point with up to 14 decimal digits accuracy. Many results will
be exact, because multiple floating point numbers can be combined for a
single mathematical value; for example: 2^(1/3), which is the cubed root
of 2 exactly.
rmath allows you to use Mathomatic with input of functions
like sin(x) and sqrt(x) automatically expanded to equivalent algebraic
expressions by the m4 macro processor. The elapsed time, the CPU time, and
the system time of the Mathomatic process are displayed in seconds upon
exit.
- -b
- Enable bold colors. Color mode will be turned on and colors
will be brighter if this option is specified. Same as the "set bold color"
command.
- -c
- Toggle color mode. This mode outputs ANSI terminal escape sequences
to make each level of parentheses a different color, for easier reading.
Requires a terminal emulator that supports ANSI color escape sequences.
If the colors are too hard to see, use the -b option to increase the brightness.
- -h
- Display a brief help message listing all of these options and then exit.
- -m number
- Change the memory size of equation spaces. It is followed by a
decimal floating point number which is a multiplier of the default equation
space size. This allows larger equation spaces so that manipulating extremely
large expressions will succeed without getting the "Expression too large"
error. Specifying a number higher than 100 may make Mathomatic unresponsive.
- -q
- Set quiet mode. The startup message and prompts are not displayed. This
is useful when piping or redirecting input into Mathomatic, because the
input won’t be displayed, so prompt output should be turned off. This option
does the same thing as the "set no prompt" command.
- -r
- Disable readline
input processing. Readline allows using the cursor keys and outputs terminal
control codes which can be turned off with this option.
- -s level
- Set the
enforced security level for the Mathomatic session. Level 0 is the default
with no security. Level 1 disallows shelling out. Level 2 disallows shelling
out and writing files. Level 3 disallows shelling out and reading/writing
files for complete security. This run-time option was created for use on
open public servers that can’t use the SECURE compile-time define.
- -t
- Set
test mode. Used when testing and comparing output. Bypasses loading startup
file, turns off color mode and readline, sets wide output mode, ignores
pause command, etc.
- -u
- Guarantee that standard output and standard error
output are unbuffered. Useful when piping.
- -v
- Display version number, compilation
options used, maximum possible memory usage, then exit.
- -w
- Set wide output
mode for an unlimited width output device like the "set wide" command does.
Sets infinite screen columns and rows so that 2D (two dimensional) expression
output will always succeed and not be downgraded to 1D output when it doesn’t
fit in the display area. Use when redirecting output or with a terminal
emulator that doesn’t wrap lines. This mode only affects 2D output.
- -x
- Enable
HTML output mode (which is also valid XHTML). This makes Mathomatic output
suitable for inclusion in a web page. The color mode and bold colors flags
affect this mode, allowing HTML color output. Wide output mode is also set
by this option, meaning expressions will always be displayed in 2D.
After
any options, text files may be specified on the shell command line that
will be automatically read in with the read command.
Mathomatic is best
run from within a terminal emulator. It uses console line input and output
for the user interface. First you type in your mathematical equations in
standard infix notation, then you can solve them by typing in the variable
name at the prompt, or perform operations on them with simple English commands.
Type "help" or "?" for the help command. If the command is longer than 4
letters, you only need to type in the first 4 letters. Most commands operate
on the current equation by default.
A command preceded by an exclamation
point (such as "!ls") is taken to be a shell command and is passed unchanged
to the shell (/bin/sh). "!" by itself invokes the default shell, which is
specified in the SHELL environment variable. "!" is also the factorial operator.
Complete documentation is available in HTML format; see the local documentation
directory or online at http://mathomatic.org/math/doc/
for the latest Mathomatic
documentation.
- EDITOR
- The EDITOR environment variable specifies
which text editor to use for the edit command.
- ~/.mathomaticrc
- Optional
startup file containing Mathomatic set command options. It should be a text
file with one set option per line. Do not include the word "set". For example,
the line "no color" will make Mathomatic default to non-color mode, which
is useful if you aren’t using a standard ANSI terminal emulator.
Mathomatic
has been written by George Gesslein II (gesslein@linux.com) with help from
John Blommers (www.blommers.org). It is free software, available under the
terms and conditions of the GNU Lesser General Public License from http://www.mathomatic.org
The command to take the limit of an expression is partially
functional and experimental. All else should work perfectly; if not, please
report it as a bug on the Launchpad website: http://launchpad.net/mathomatic
matho-primes(1)
, primorial(1)
, matho-mult(1)
, matho-sum(1)
, matho-pascal(1)
,
matho-sumsq(1)
Table of Contents