Integral Estimator version 2
(12-16-1998)
(C) 1998 Bennett S. Kalafut

This program will estimate integrals by the Riemann Sum method, Trapezoid
Rule, Simpson's Rule (what the calculator uses), and the Torrez Method.

The less accurate methods and Simpson's Rule can be used to solve problems 
involving them on homework and tests.  

The Torrez Method (devised by John C. Torrez, who happens to be my calculus
teacher, and published, I think, in the late 1980s) is not yet a popular 
estimation method because it takes longer than Simpson's rule.  However, it 
produces more accurate results.  Simpson's rule fits vertical parabolas to a 
curve and finds the area underneath them.  The Torrez Method fits parabolas 
which may be rotated for further accuracy.  It is the most accurate but the 
slowest of the four methods.  It is actually more accurate than the 
calculator's built-in numerical integral operation.  

As far as I know, this is the only estimator in existence using this formula.

If you have any questions, problems, or suggestions for streamlining or
improvement, my permanent e-mail address is bkalafut@bigfoot.com.

Feel free to distribute this program, as long as the text file remains with
it.

Special thanks to Andrew Kalafut for shaving a few hundred bytes off of the
program.