File: changes.txt

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                         VERSION HISTORY OF MATHOMATIC
                         -----------------------------
                  Latest changes are at the end of this file.
               This file may be obtained at "www.mathomatic.org".
                  All changes were made by George Gesslein II.
               --------------------------------------------------

CHANGES MADE TO MATHOMATIC V12.8.9 TO BRING IT UP TO VERSION 12.9.0:

Documentation and code cleanup.

3/6/08 - Added demo "tests/circles.in", completes in 1 second!

3/7/08 - Made all error text the color red when color mode is enabled.

3/8/08 - Made "set true_modulus" the default.

3/13/08 - Implemented integral divide operator "//" which divides and truncates result to an integer.
          This operator is handy for doing integer arithmetic.

3/16/08 - Made all warning text the color yellow.

CHANGES MADE TO MATHOMATIC V12.9.0:

3/27/08 - Deleted outdated "doc/notes.html".

3/29/08 - Set command allows the following option prefix words: no, not, off, false, yes, on, true.

3/30/08 - Updated matho-primes to work with architectures that don't support long double.

CHANGES MADE TO MATHOMATIC V12.9.1:

Some minor corrections were made.

4/5/08 - Turned off readline file name completion, tab is now just a tab.

CHANGES MADE TO MATHOMATIC V12.9.2:

4/20/08 - Read set options in either "~/.mathomaticrc" or "mathomatic.rc" when starting up under Cygwin.

4/23/08 - A major fix was made to the simplify command, it was not expanding fractions enough.

CHANGES MADE TO MATHOMATIC V14.0.0:

Code and documentation cleanup.

Disallow variable name "all" in expressions.  "all" means all normal variables and is a reserved word now.

4/25/08 - Set command parser now reports errors properly.

4/28/08 - More correct simplification restriction added: (x^n)^m remains unsimplified unless "symbolic" option is used.
          This was documented but not fully implemented.  You need to use "simplify symbolic" to simplify like before.

CHANGES MADE TO MATHOMATIC V14.0.1:

4/30/08 - The calculate command user interface was corrected.

5/4/08 - Added "simplify sign" command option, which conveniently expands all "sign" variables and simplifies.

CHANGES MADE TO MATHOMATIC V14.0.2:

Code and comments cleanup.

5/16/08 - Added "derivative nosimplify" command option, which does no simplification after differentiating.
          Fixed the taylor command to work with larger expressions with more derivatives by simplifying better.

CHANGES MADE TO MATHOMATIC V14.0.3:

Cleanup.

5/19/08 - Fixed for less floating point round-off error.

5/27/08 - Author's email address changed to "georgegesslein@gmail.com".

5/31/08 - Fixed to simplify sign variables better, sign^(1/3) now simplifies to sign.
          Added "solve verify" command option, which verifies the results of the solve command.

CHANGES MADE TO MATHOMATIC V14.0.4:

Cleanup.

Improved the "solve verify" command option by simplifying more and used it in the tests and demos.

6/14/08 - Added "Divide by zero" warning message whenever that happens.  Result still generates infinity.

CHANGES MADE TO MATHOMATIC V14.0.5:

6/18/08 - Improved divide command and verification of floating point GCDs.

6/19/08 - Improved "solve verify" even more, displaying a warning if verification is not needed.