Near a year ago, I wrote:

*In this MoHPC, you can read the next in the 32S page:*

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<<The HP-32S featured to the first RPN solver. The HP-34C had introduced the first built-in root-finder which could solve for f(x) = 0 expressed as an RPN program. To use the root finder the user wrote a function that accepted x, and left f(x) in the X register. The RPN Solver on the HP-32S allowed the user to enter a program which accepted multiple variables and computed f(a, b, c, ...) = 0. After entering a single program, the user could solve for any variable.>>*

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So, solve for ANY variable, is "the new" of the 32S/32SII/42S solver when comparing to the 34/15C solver.*

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I don't know if this is well known for the 15C users, but take a look at this post of Karl Schneider *

Then you, Karl, promised an ARTICLE about this, do you remember? ;-)

Raul (a grateful user of "your" 15c solver)

*Edited: 25 Feb 2004, 12:16 p.m. *