Reference Guide

3-108 Full Command and Function Reference
HOME
Type: Command
Description: HOME Directory Command: Makes the HOME directory the current directory.
Access: …µ HOME
!& J
Input/Output: None
See also: CRDIR, PATH, PGDIR, UPDIR
HORNER
Type: Command
Description: Executes a Horner scheme on a polynomial. That is, for a given polynomial P, and a number r,
HORNER returns QUOT(P/(x–r)), r and also P(r)
Access: Arithmetic, !Þ POLY L
Input: Level 2/Argument 1: A polynomial, P.
Level 1/Argument 2: A number, r.
Output: Level 3/Item 1: QUOT(P/(x–r))
Level 2/Item 2: r
Level 1/Item 3: P(r), the remainder of the division process.
Flags: Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag –3 clear).
Radians mode must be set (flag –17 set).
Example: For r = 3, find the result of executing a Horner scheme on the following polynomial:
x
2
x 1+ +
Command: HORNER(X^2+X+1,3)
Results: (X+4,3,13)
i
Type: Function
Description: i Function: Returns the symbolic constant i or its numerical representation, (0, 1).
Access: !¥ (¥is the left-shift of the Ikey).
Flags: Symbolic Constants (–2), Numerical Results (–3)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
'i'
→
(0,1)
See also: e, MAXR, MINR, π
IABCUV
Type: Command
Description: Returns a solution in integers u and v of au + bv = c, where a, b, and c are integers.
Access: Arithmetic, !Þ INTEGER
Input: Level 3/Argument 1: the value of a.
Level 2/Argument 2: the value of b.
Level 1/Argument 3: the value of c.