Reference Guide

Full Command and Function Reference 3-123
vector or a list of Jordan chains, each of them ending with an "Eigen:"-tagged eigenvector).
Level 1/Item 4: An array of the eigenvalues, with multiplicities
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: Perform the following diagonalization:
Command: JORDAN([1,1][1,1])
Result: {X^2-2*X,
X^2-2*X,
{0: [1,-1]}, 2: [1,1]}
[0,2]}
KER
Type: Command
Description: Computes the basis of the kernel of a linear application f .
Access: Matrices, !Ø LINEAR APPL
Input: A matrix representing a linear application f in terms of the standard basis.
Output: A list of vectors representing a basis of the kernel (also called the nullspace) of f.
Flags: Exact mode must be set (flag –105 clear).
Numeric mode must not be set (flag –3 clear).
Example: Find the kernel of
1 1 2
2 1 3
3 1 4
Command: KER([1,1,2][2,1,3][3,1,4])
Result: {[1,1,-1]}
See also: BASIS, IMAGE
KERRM
Type: Command
Description: Kermit Error Message Command: Returns the text of the most recent Kermit error packet.
If a Kermit transfer fails due to an error packet sent from the connected Kermit device to the
calculator, then executing KERRM retrieves and displays the error message. (Kermit errors not in
packets are retrieved by ERRM rather than KERRM.)
Access: …µ KERRM
Input/Output:
Level 1/Argument 1 Level 1/Item 1
→
“error message”
See also: FINISH, KGET, PKT, RECN, RECV, SEND, SERVER
KEY
Type: Command
Description: Key Command: Returns a test result and, if a key is pressed, returns the row-column location x
n m
of that key.
KEY returns a false result (0) to item 2 (stack level 1) until a key is pressed. When a key is pressed,
it returns a true result (1) to item 2 (stack level 1) and x
n m
to item 1 (stack level 2). The result x
n m
is a two- or three-digit number that identifies the row and column location of the key just pressed.