IMPLDIFF (LGM) v1.00
TI-89
"Implicit Differentiation"
by Dmitriy Myedvyedyev (aka Dima Medvedev, aka Dimalitious D-Myster)
medvedbr@hotmail.com
Category: BASIC/MATH/CALCULUS
Starting - Completion Date: 03/16/2002 - 03/17/2002
***THIS PROGRAM IS AVAILABLE WITH MANY OTHER USEFUL CALCULUS PROGRAMS IN A CALCPACK PACKAGE CALLED "CALC1LGM" (available by the beginning of April of 2002)
Copyright 2002 Dmitriy Myedvyedyev



-------------Description:
This program does implicit differentiation. All you do is enter the equation and the program does the rest for you, returning dy/dx in two different formats. The program doesn't necessarily do IMPLICIT differentiation. It can dor egular derivatives too. If you enter something like y = x^4 + 1/2*x, it will return 4x^3 + 1/2.



-------------Instructions:
Transfer the IMPLDIFF.89P file to any directory on your calculator. When you run the program, you are asked to enter an EQUATION (equation, NOT a function, for example, you must enter "y=sin(x)" instead of just "sin(x)". Then just press enter (or esc to cancel) and you will be given the derivative in two formats: pretty print and a long one-line format. Note that this program does NOT change the mode settings, so you will have to change the settings yourself before running the program.



-------------Update(s):
None. This is the first version of the program.



-------------Known Bugs and Important Notes:
As long as you enter a valid function, there should be no errors. Unacceptable inputs include expressions instead of equation (x^2 is incorrect, y=x^2 is correct), the equation y=y (or 2y=2y, etc), equations defined in terms of variable other than x and y. ALL equations MUST be difined in terms of x and y: x is independent variable, y is dependent. 


-------------Thanks!
Thank you for downloading this program by Dmitriy Myedvyedyev. Please send your comments and/or suggestions to medvedbr@hotmail.com



-------------People to Remember:
Albert Einstein, Isaac Newton, Blaise Pascal, Euclid, Dmitriy Mendeleyev, Thomas Edison, Archimedes, Stephen Hawking, Alexander Friedmann, SB, SH, BM, AM, JC, FB, CC, DW, JS, TW, MM, CC, JH, TL, JC, SK, AL . . .  
             to be continued . . .

The universe . . . What a great puzzle! Number one on the unsolved mysteries list. 

-------------Dimalitious D-Myster-------------
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-------------Dimalitious D-Myster's Little Green Men Corporation