Just realized how easy it is to call f '(x) in a solve routine! Boy does that make f '(x) useful in finding f(x) max/mins! So cool...and you can take the value in the x register to find f(x), and use that same x in the f ''(x) function to determine max or min! Way cool for a pocket machine.

That's Pauli's merit.

d:-)

You can freely nest calls to solve, integrate, f', f", sum and product with each other and even with themselves. Thank Marcus for implementing the proper nesting of these. When I implemented them originally they didn't nest at all. With the addition of the local register code these function could be nested.

- Pauli