Infinity (MathObject Class)
Infinity Class
The Infinity class handles the positive infinity of the extended reals. This value can be negated and used in intervals, but can be added to Reals (or other MathObjects) and can't be used as an argument to functions like sin()
or sqrt()
. Infinity can be created in any Context, though Numeric
context is commonly used.
Creation
In Perl code, you can use Infinity
to obtain this value, or (Infinity)
to obtain its negation. E.g.,
Context("Numeric"); $Inf = Infinity; $MInf = (Infinity); Context("Interval"); $I = Interval("(",0,Infinity,"]"); # but easier as Interval("(0,infinity]");
Answer Checker
As with all MathObjects, you obtain an answer checker for an Infinity object via the cmp()
method:
ANS(Infinity>cmp); ANS(((Infinity))>cmp);
The Infinity class supports the common answerchecker options. There are no additional options.
Methods
The Infinity class supports the Common MathObject Methods. There are no additional methods for this class.
Properties
The Infinity class supports the Common MathObject Properties, and the following additional ones:
Property  Description 

$r>{isNegative}

True when the object represents Infinity , false otherwise. You should not set this value yourself.
