Full Command and Function Reference 3-87
INTEGER
CAS: Display a menu or list of CAS integer operations.
INTVX
CAS: Find the antiderivative of a function symbolically, with respect to the current default variable.
INV
Type: Analytic function
Description: Inverse (1/x) Analytic Function: Returns the reciprocal or the matrix inverse.
For a complex argument (x, y), the inverse is the complex number:
x
x
2
y
2
+
----------------
y–
x
2
y
2
+
----------------
,
⎝⎠
⎜⎟
⎛⎞
Matrix arguments must be square (real or complex). The computed inverse matrix A
-1
satisfies A
× A
-1
= I
n
, where I
n
is the n × n identity matrix.
Access: Y
Flags: Numerical Results (–3)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
z
→
1/z
[[ matrix ]]
→
[[ matrix ]]
–1
'symb'
→
'INV(symb)'
x_unit
→
1/x_1/unit
See also: SINV, /
INVMOD
CAS: Perform modular inversion on an object, modulo the current modulus.
IP
Type: Function
Description: Integer Part Function: Returns the integer part of its argument.
The result has the same sign as the argument.
Access: !´
REALL IP ( ´ is the left-shift of the Pkey).
Flags: Numerical Results (–3)
Input/Output:
Level 1/Argument 1 Level 1/Item 1
x
→
n
x_unit
→
n_unit
'symb'
→
'IP(symb)'
See also: FP
IQUOT
CAS: Return the integer (or Euclidean) quotient of integers a, b; the integer part of a/b.
IREMAINDER
CAS: Return the remainder of the division of one integer by another.
ISOL
Type: Command
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