2nd of June 1996

Hello,
Here is PERKILIB wich is in fact 5 programs to do maths.
It's included tabvar(),cpli(),cplx(),conic(),and eqdiff()



		*********TABVAR()**********
	This program may be useless for lot of u but, very usefull
for french students. It gives a complete studie of an equation:
differebtiate eqution, Integrate equation, Roots and variations.
The equation must be stored in y1(x) [do <diamonds> <y=> and store
it in y1: ]
Then do tabvar() in [PERKI]  (you should move this prog in HOME )
Then give the lower limit of the domain (infinte is accepted)
Same with the upper limit

Then let the prog do the rest.

ATTENTION!! never use COS() SIN() and all trig functions
ATTENTION!! This programm may(because there still bugs, not much) gives
you silly results, but you will see it instantetly.


There is a screenshot of the eqution -x^3+3x+2 called tabvar.tiff


		********conic********
Self explicit programm that resolve equations likes
a.x^2+b.x+c.y^2+d.y+e=0
run conic()
and gives a,b,c,d,e and that's it
the programm will give you the properties of the conic
screenshot: conic1.tiff
And then draw the equation automatically
screenshot: conic2.tiff

There are no bug reported but i did the proggy is in French
so, if someone have a translation....... :)

		*******eqdiff*********
Solves differentiate equations like: a.y''+b.y'+c.y=0
That's not much but it works perfectly
run eqdiff()
Then enter a,b and c and you'll obtain the equation of y(x)

screenshot: eqdiff.tiff

		*******cpli and cplx ******
cool and quick and small little progs
They are really usefull for complexes transformations 
A complexe z=a+b.i (a and b reals)
z can also be written as z=m.e^(i.A) (m real and O angle in radians)

If you do cplx(a,b) it will show you the m.e^(i.A) form and draw
the result on a trigonometrical circle.

If you do cpli(m,O) it will show you the a+i.b form and draw
the result on a trigonometrical circle.

example: if you have the complexe 1+i do cplx(1,1)
 screenshot: cplx.tiff

example: if you have the complexe 2e^(i.pi/2) do cpli(2,pi/2)
 (pi=3.14..)
 screenshot: cpli.tiff


		*****Remarks*****
Sorry for my bad speaking english (I hope you'll anderstand)
If there is any question e-mail me (before the 27th of june 1996)
                                    After: write to me
If you discover any bugs: same
If you want to translate some parts of the programms: same


U can talk to me on IRC #CALC-TI on EFNET

				Pierre-Mikael Legris
				Perki
e-mail perki@ix.netcom.com

Pierre-Mikael Legris
La Fleuriais  Forge
35510 Cesson Sevigne
FRANCE