2004/06/14 1.21 Minor documentation corrections.

2004/06/10 1.20 Capitalized module file names correctly.

2004/06/09 1.19 Lib, Pod cleanup

2004/06/08 Observed transit of Venus in room converted to Camera Obscura.

2004/06/04 1.18 Equation simplification tied to += operator

2004/06/02 1.17 Following further excellent suggestions from Mike Schilli slightly improved notation for equation solving:

**eq** is a synonym for **-**

**>** is a synonym for **solve()**

Thus:

$x = symbols('x'); ($a, $b) = @{ ($x**2 eq 5*$x+6) > $x };

print "$a,$b\n";

# 2,3

2004/06/01 1.16 Following excellent suggestions from Mike Schilli detect constants with decimal places and convert them to rational fractions, thus 1.2 becomes 12/10. The rationale: using fractions avoids loss of precision, if you only need approximate numerical results, there is no need for symbolic manipulations.

2004/05/28 1.15 Minor changes to documentation.

2004/05/27 1.14 Admiring new CPAN Layout: diff+grep. Updated META.yml requires/recommends to match MANIFEST. Removed use of Hash::Util as this seems to be causing problems with ActiveState.

2004/05/11 1.13 Memory Leak and **exp()** problems solved:

1. Solved a memory leak by using Scalar::Util::weaken(). This has reduced memory consumption when running the test cases from 130M to 37M: intermediate expressions are now being freed. I believe that this has been the source of the erratic failures on various platforms, other than my development system, as reported (most helpfully) by CPAN testers and a Mac OSX user: these reported errors appear to have been related to running out of memory.

2. Corrected **exp(-i)*exp(-i)** which was being correctly reduced to
**exp(0)**, but should have been reduced further to **1**, which was
causing the multiply out of **exp(i...)** in **cot(x) == 1/tan(x)** to fail.

3. Added the != operator, as this simplifies testing with the test harness.

2004/04/30 1.12 Included PREREQ_PM in Makefile as a result of notes from automated CPAN testing.

2004/04/24 1.08 Included test cases in manifest and renamed to .t in line with observed practice.

2004/03/28 Split into three classes. Considerable performance
improvements. Added standard Perl Test harness. Unfixed `power()`

so we are back to constant powers.

2004/03/14 Fixed `power()`

so that it recognizes constant and variable
powers. Added TODO List. Finished testSM(): new requirements in TODO.

2004/03/13 Added change log on esteemed advice of Steffen Müller. Made
yet another attempt to stop `polynomialDivide()`

from producing an
infinite series as a representation of a single term. Most of
mathematics seems to erupt from the division of one polynomial by
another.

Programminig

Wy

Wy

yW

Wy

Wy

Wy

yW

Wy

Programming

Wy

Wy

Wy

Wy

Wy

Wy

Wy

Wy