smath - A Simple Symbolic Mathematics Library and Command Line Tool

This is code I wrote back around 1996 and I'm publishing it here to have it out in the public forum.

It mimics Mathemetica in syntax and operation.

What can you do with smath?

SMath is more a curiosity than a complete symbolic math processor. Still, it is capable of demonstrating some basic math expression reduction using simple built-in rules.

$ ./smath

In[0] := 1 + 1
Out[0] = 2

In[1] := 1 + a
Out[1] = 1 + a

In[2] := a + 1
Out[2] = 1 + a

In[3] := b + b
Out[3] = 2 b

In[4] := Sin[Pi/2]
Out[4] = 1

In[5] := Cos[Pi/2]
Out[5] = 0

In[6] := a / a
Out[6] = 1

But beware, many simple expressions will not reduce completely:

In[6] := (b + c) / (b + c)
Out[6] = (b + c) (b + c)^-1

In[7] := (b+2) (b - 2)
Out[7] = (2 + b) (b - 2)

Building

Building requires a yacc and a lex variant. byacc, Bison, flex, and lex are supported. On Linux:

$ sudo apt get install -y yacc flex

There's a simple Makefile, which can be adapted to your local OS.

$ cd src
$ make

Reporting bugs

While the GitHub Issue system is enabled, don't expect that I will respond to error reports.

MIT License

MIT License

Copyright (c) 1996 Riley Rainey

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

License

rrainey/smath

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