Subtmod, Sylvester – HP 49g Graphing Calculator User Manual
Page 182
Attention! The text in this document has been recognized automatically. To view the original document, you can use the "Original mode".
Example:
Substitute X = z+l for X in the following expression, and
apply the EXPAND command to simplify the result:
+ 3x + l
Command:
S U B S T { X - ' 2 + 3 * X + 7 , X = Z + 1 )
E X P A N D ( A N S ( 1 )
)
Result:
Z " 2 + 5 * Z + 1 1
SUBTMOD
Type:
Function
Description:
Performs a subtraction, modulo the current modulus.
Access:
Arithmetic,
0 ® B MODULO
Input:
Level 2/Argument 1: The object or number to be
subtracted from.
Level 1/Argmnent 2: The object or number to subtract.
Output:
The result of the subtraction, modulo the current
modulus.
Flags:
Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
SYLVESTER
Type:
Command
Description:
For a symmetric matrix A, returns D and P where D is a
diagonal matrix and
A = P'^DP
Access:
Catalog, ®
Input:
A synunetric matrix.
Output:
Level 2/Item 1: the diagonal matrix, D.
Level 1 1/Item 2: The matrix P.
Flags:
Exact mode must be set (flag -105 clear).
Numeric mode must not be set (flag -03 clear).
Computer Algebra Commands
Page 14-59