This is the site where I publish my programming projects: latest changes: 06.12.1999

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If anybody has improvements or wants to criticize on bugs, feel free to send an e-mail to bug (a) software.behnel.de

Disclaimer:

The programs on this site can be used FOR FREE according to the license they are provided with. Therefore I can NOT afford to take ANY warrenty for whatever they happen to do to your computer.

1. You'll get what you've payed for
2. It's free ...

TermBaum

TermBaum (JAVA 1.1) is a library for Tree representations of formulas. It originated from a programming project in an assignment at my home university.
Some Features:

• parses infix terms including +,-,*,/,^,() and various functions
• calculates function values as java.util.BigDecimal
• differentiates and simplifies functions
• easily extensibile by adding simple classes that implement calculation and differentiation of new functions
• supports any number of variables that can themselves have functions as values (i.e. Makros)
• debug mode to trace the steps during parsing and function optimization

The JAR-file comes with a handy little commandline based calculator that shows some of the features of the library.

The code is still a bit q'n'd, since it was one of my first JAVA-Projects about one year ago, but I sort of worked on it a bit, so now it's almost readable enough ;)

License: LPGL2

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Turingmachine MTT.TM

MTT.TM (Java 2) is a Turingmachine and, yes, I know, just one more of them. It's multithreaded, nondeterministic and can be used as a recognizing TM.
It's programming model uses different sorts of Turing tables providing incomplete tables and enabling the head to write and move in one single step. This allows the TM programs to become shorter.
It also allows the usage of macros.
Maybe it whould be easier to say what it's not able to do, but I didn't find anything yet ;)
Anyway, so far this should only be interesting or programmers who want to use a TM, as it doesn't have any user interface (yet).

Documentation (javadoc) and Sourcecode are provided.

License: GNU-GPL

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StarFlight

StarFlight (Java 1.1) is a Java-Applet simulating the well-known star flight, where stars are passing the window of a spaceship. A text can be displayed inside the window.
The Applet - to be viewed here - can be conigured in the following way:

The sourcecode is provided under the GNU-GPL.

Development:
23.01.98	my first Java-Applet...
10.02.98	changed some details, fighting different browser versions, types etc.
09.02.99	mouse support added ;)

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SiD - symbolic differentiation

SiD (Win32) is a Programm that differentiates and simplifies mathematical terms.

The operators supported are: + , - , * , / , ^ , ln , ( , ) , sin , cos , tan

The program should be quite complete (That I hope).
But if anyone happens to find a term that isn't differentiated correctly or should be simplified more heavily, feel free to send an e-mail to bug (a) software.behnel.de
Note: This hasn't happened for quite some time ...

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