Graphmatica, version 3.50b
==========================

by Keith Hertzer - Copyright (c) 1996 kSoft, Inc.
Saturday 07 December 1996


Files in this archive:
----------------------
README.TXT        6,414  12/07/96  --- this file
GRAPHMAT.EXE    199,586  12/07/96  --- program file
GRAPHMAT.DOC    119,939  12/07/96  --- documentation/manual
REGISTER.TXT      2,566  12/07/96  --- mail-in registration form
GRMAT1.HLP       22,294   8/07/95  \
GRMAT2.HLP        5,890   8/07/95   |
GRMAT3.HLP        6,734   8/07/95   |
GRMAT4.HLP        4,111   8/07/95   |- on-line help files
GRMAT5.HLP        2,775   8/07/95   |
GRMAT6.HLP        3,899   8/07/95   |
GRMAT7.HLP        4,851   8/07/95  /
DIFEQ.GR            592   8/07/95  \
GRAPHMAT.GR       1,188   8/07/95   |
INEQUAL.GR          297   8/07/95   |
LOGLOG.GR           270   8/07/95   |_ demonstration equation
ODE2.GR             474   8/07/95   |  list files
POLAR.GR            383   8/07/95   |
TRIG.GR             432   8/07/95   |
XYDEMO.GR           439   8/07/95  /


Installing Graphmatica:
-----------------------
To be able to use the on-line help facility, you should place the six
.HLP files on the same disk and directory as the executable file. Then,
before you run Graphmatica, change the current drive/directory to where
those files are. For example, to install Graphmatica from the disk in
drive A: to some directory C:\GRAPHICS, you would type:
        C:\>copy  a:graphmat.*  c:\graphics
        C:\>copy  a:grmat?.*  c:\graphics
        C:\>copy  a:*.gr  c:\graphics
and to run the program, you would type:
        C:\>cd c:\graphics
        C:\GRAPHICS>graphmat


Notes:
------
Please do not edit any of the files GRMAT*.HLP. They are formatted
especially for use under the Graphmatica help view function, broken up
into screens of 23 lines. Altering these files may result in abnormal
page breaks and prevent effective use of the online help.

What's new in version 3.50b:
----------------------------
Added new checking to prevent floating point errors drawing ODEs
that go off screen very steeply.

What's new in version 3.50a:
----------------------------

The following bugs in version 3.50 were fixed:
1. tanh function incorrectly produced "10^x"
2. Functions which are not always positive could cause fatal floating point
   errors when graphed with logarithmic graph paper.

In addition, I have added routines to trap floating point errors in all
calculations for graphs and drawing graph paper. This should virtually
eliminate the possiblity of crashes due to really complex equations or
really huge or small grid ranges.

For a complete list of what's new in version 3.5, see Appendix C of
GRAPHMAT.DOC.


Registering:
------------
For a fee of $25, you can register Graphmatica. Registered users can
use the program indefinitely guilt-free, and will receive a disk with
the next major version on it when it is released, as well as
notification of future upgrades in perpetuity.

Site licenses and special student bulk licensing plans are available.
Site license fees are $85 for the first 10 copies plus $2.50 for each
additional copy. I can accept purchase orders for transactions over
$100, but otherwise please try to write me a check. Please contact me
if you are interested for more information.

To register, print out and send in the form found in REGISTER.TXT
(also found at the end of GRAPHMAT.DOC). Or you can register using
CompuServe's Shareware Registration Database ("GO SWREG"). Request
program #111. Read Appendix D in the manual for information about
Shareware.

CREDIT CARD ORDERS ONLY -

You can order with MC, Visa, Amex, or Discover from Public (software)
Library by calling 1-800-2424-PsL or 1-713-524-6394 or by FAX to
1-713-524-6398 or by CIS Email to 71355,470. You can also mail credit
card orders to PsL at P.O.Box 35705, Houston, TX 77235-5705. The item
number for Graphmatica is #14133. PsL operators are available from 7:00
a.m. to 6:00 p.m. CST Monday-Thursday and 7:00 a.m. to 12:30 p.m. on
Friday.

THE ABOVE NUMBERS ARE FOR CREDIT CARD ORDERS ONLY.
THE AUTHOR OF THIS PROGRAM CANNOT BE REACHED AT THESE NUMBERS.

Any questions about the status of the shipment of the order, refunds,
registration options, product details, technical support, volume
discounts, dealer pricing, site licenses, non-credit card orders, etc,
must be directed to kSoft at the address on the registration form

To insure that you get the latest version, PsL will notify me the day
of your order and I will ship the product directly to you.

I am required by my contract with PsL to ship you a disk immediately
regardless of whether you have the current version already. Therefore,
if you order through PsL, you will receive the most current version
right away, as well as an upgrade to the next major release. To help
defray the additional costs, you will be charged an extra $2.50 in the
U.S. and Canada ($5 outside North America) for handling.


How to get the latest version:
------------------------------
The latest version of Graphmatica for DOS and Windows will always be
available on CompuServe and on FTP sites on the Internet.

On CompuServe, GO SCIENCE to enter the math & science forum and look in
library 5 (mathematics) for GRMxxD.ZIP (DOS) or GRMxxW.ZIP (Windows),
where xx will be the latest version number.

On the internet, use FTP or gopher to access archives.math.utk.edu
and look in the software/msdos/graphing/grmat directory for the latest
versions. The Windows version is also available at the CICA archives
(ftp.cica.indiana.edu) in the win3/util directory. Both of these sites
are mirrored at a number of places, including wuarchive.wustl.edu.

How to contact me:
------------------
You can always send me e-mail at 70711,2071 on CompuServe. On the
internet, send mail to khertz@pacbell.net or see my WWW page at
http://server.berkeley.edu/~khertz/ksoft/ksoft.html

I do NOT provide telephone support. Please don't try to get my number
through directory assistance, as you will probably just bother my
parents.

Worst comes to worst, you can write me a letter and mail it to the
address below. I promise I will respond to it, although I can't
guarantee how long it will take.

kSoft, Inc., 345 Montecillo Dr., Walnut Creek, CA 94595-2613.

