

 
Manual Reference Pages  MATH::SYMBOLICX::NOSIMPLIFICATION (3)
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NAME
Math::SymbolicX::NoSimplification  Turn off Math::Symbolic simplification
CONTENTS
SYNOPSIS
use Math::SymbolicX::NoSimplification qw(:all);
# ... code that uses Math::Symbolic ...
# Wont use the builtin simplification routines.
# ...
do_simplify();
# ... code that uses Math::Symbolic ...
# Will use the builtin simplification routines.
# ...
dont_simplify();
# ... you get the idea ...
DESCRIPTION
This module offers facilities to turn off the builtin Math::Symbolic
simplification routines and replace them with routines that just clone
the objects. You may want to do this in cases where the simplification
routines fail to simplify the Math::Symbolic trees and waste a lot of
CPU time. (For example, calculating the first order Taylor polynomial of
a moderately complex test function was sped up by 100% on my machine.)
A word of caution, however: If you turn off the simplification routines,
some procedures may produce very, very large trees. One such procedure
would be the consecutive application of many derivatives to a product
without intermediate simplification. This would yield exponential
growth of nodes. (And may, in fact, still do if you keep the simplification
heuristics turned on because most expressions cannot be simplified
significantly.)
USAGE
Just load the module to turn off simplification. To turn it back on, you
can call Math::SymbolicX::NoSimplificationdo_simplify()> and to
turn it off again, you may call
Math::SymbolicX::NoSimplificationdo_simplify()>. Since the module’s name
is quite long, you may choose to import do_simplify() and/or
dont_simplify() into your namespace using standard Exporter semantics.
See below.
do_simplify

Turn simplification back on.

dont_simplify

Turn simplification off.


EXPORT
None by default, but you may choose to import either the routines
do_simplify() and/or dont_simplify() or both by using the
:all exporter group. See also: Exporter
AUTHOR
Steffen Mueller, <smueller@cpan.org>
Please send feedback, bug reports, and support requests to the Math::Symbolic
support mailing list:
mathsymbolicsupport at lists dot sourceforge dot net. Please
consider letting us know how you use Math::Symbolic. Thank you.
If you’re interested in helping with the development or extending the
module’s functionality, please contact the developers’ mailing list:
mathsymbolicdevelop at lists dot sourceforge dot net.
COPYRIGHT AND LICENSE
Copyright (C) 20052006 Steffen Mueller
This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.
SEE ALSO
New versions of this module can be found on
http://steffenmueller.net or CPAN.
Math::Symbolic,
perl v5.20.3  MATH::SYMBOLICX::NOSIMPLIFICATION (3)  20061105 
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