IMP (LGMF) 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: 04/07/2002 - 04/07/2002
***THIS PROGRAM IS AVAILABLE WITH MANY OTHER USEFUL CALCULUS *FUNCTIONS* IN A CALCPACK PACKAGE CALLED "calcLGMF" (available by the beginning of May of 2002)
Copyright 2002 Dmitriy Myedvyedyev



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



-------------Instructions:
Transfer the IMPLGMF.89F file to any directory on your calculator. When you run the fucntion, you need 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 and you will be given the derivative. 
Example:
"implgmf(y=x^2)" returns "2x"



-------------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