HP 15c Collector's Edition User Manual

276 Function Summary and Index
> 8 Calculates
Frobenius norm of matrix
specified in X-register
(page 150).
> 9 Calculates
determinant of matrix
specified in X-register
(also does LU
decomposition of the
matrix) (page 150).
c Transforms matrix
stored in “partitioned
form” (Z
P
) to “complex
form” (Z
C
) (page 162).
p Transforms matrix
stored in “complex form”
(Z
C
) to “partitioned form”
(Z
P
) (page 162).
~ T 0 T 5
T 6 Conditional
tests for matrix
descriptors in the X- or
X- and Y-registers. ~
and T 0 (x ≠ 0) test
the quantity in the X-
register for zero. Matrix
descriptors are
considered nonzero.
T 5 (x = y) and
T 6 (x ≠ y) test if
the descriptors in X and Y
are the same. The result
affects program
execution: skip (one line)
if false (page 174).
Number Alteration
a Yields absolute
value of number in
display (page 24).
q Leaves only
fractional portion of
number in display
(X-register) by truncating
integer portion
(page 24).
‘ Leaves only integer
portion of number in
display (X-register) by
truncating fractional
portion (page 24).
& Rounds mantissa
of entire (10-digit)
number in X-register to
match display format
(page 24).
Percentage
k Percent. Computes
x% (value in display) of
number in the Y-register
(page 29). Unlike most
two-number functions,
k does not drop the
stack.
∆ Percent difference.
Computes percent of
change between number
in Y-register and number
in display (page 30).
Does not drop the stack.
Prefix Keys
´ Pressed before a
function key to select the
gold function printed
above that key
(page 18).
| Pressed before a
function key to select the
blue function printed
below that key
(page 18).
For other prefix keys,
refer to Display Control
keys (page 273), Storage
keys (page 278), and the
Programming Summary
and Index (page 278).
CLEAR u Cancels
any prefix keystrokes
and partially entered
instructions such as ´
i (page 19). Also
displays the complete
10-digit mantissa of the
number in the display
(page 60).
Probability
c Combination.
Computes the number of
possible sets of y
different items taken x
at a time, and causes the
stack to drop (page 47).

HP 15c Collector's Edition Specifications

General

Model	HP 15c Collector's Edition
Category	Calculator
Type	Scientific
Power Source	Battery
Manufacturer	HP
Display	LCD
Functions	complex numbers, matrix operations

Summary

Introduction

This Handbook

Outlines the structure of the manual, detailing its parts and how to use it for learning.

The HP Community

Discusses user groups and websites for HP calculator enthusiasts and information sharing.

Part I: HP 15c Fundamentals

Section 1: Getting Started

Covers basic operations like powering on, keyboard layout, and primary/alternate functions.

Section 2: Numeric Functions

Explains essential numeric operations including logs, trig, powers, and conversions.

Section 3: The Automatic Memory Stack, LAST X, and Data Storage

Details the RPN stack, LAST X register, and data storage operations.

Part II: HP 15c Programming

Section 6: Programming Basics

Introduces core programming concepts: creating, loading, running programs, and memory.

Section 8: Program Branching and Controls

Covers controlling program flow using branching, loops, and conditional tests.

Part III: HP 15c Advanced Functions

Section 11: Calculating With Complex Numbers

Covers entering, manipulating, and performing calculations with complex numbers.

Section 12: Calculating With Matrices

Explains matrix operations, including dimensioning, element access, and calculations.

Section 13: Finding the Roots of an Equation

Details using the SOLVE function for numerical root finding and equation solving.

Section 14: Numerical Integration

Explains how to perform numerical integration using the ∫f(x)dx key and subroutines.

Appendix A: Error Conditions

Error 8: No Root

Explains the error when the SOLVE function cannot find a root.

Error 0: Improper Mathematics Operation

Lists and explains errors related to mathematical operations and illegal arguments.

Appendix D: A Detailed Look at SOLVE

How SOLVE Works

Explains the numerical technique and logic behind the SOLVE algorithm.

Finding Several Roots

Discusses methods for finding multiple roots of an equation using the SOLVE function.