com.singularsys.extensions.field.functions

Class FieldSqrt

java.lang.Object

com.singularsys.jep.functions.PostfixMathCommand

com.singularsys.jep.functions.UnaryFunction

com.singularsys.extensions.field.functions.FieldSqrt

All Implemented Interfaces:

PostfixMathCommandI, java.io.Serializable

public class FieldSqrt
extends UnaryFunction

Calculate the square root of a number using any field. Uses the Babylonian method with the iterative formula x_{n+1} = (x_n + S / x_n) / 2 where S is the input number scaled to lie between 1/16 and 16. Algorithm will stop until convergence or the maximum number of iterations is reached.

See Also:

Serialized Form

Field Summary

Fields inherited from class com.singularsys.jep.functions.PostfixMathCommand

curNumberOfParameters, name, NaN, numberOfParameters

Constructor Summary

Constructors

Constructor and Description
FieldSqrt(FieldI f, int num_itts) Constructor

Method Summary

Modifier and Type	Method and Description
java.lang.Object	eval(java.lang.Object arg)
int	getNum_itts()
void	setNum_itts(int num_itts)
java.lang.String	toString()

Methods inherited from class com.singularsys.jep.functions.UnaryFunction

run

Methods inherited from class com.singularsys.jep.functions.PostfixMathCommand

asArray, asBool, asDouble, asInt, asLong, asStrictInt, asString, checkNumberOfParameters, getName, getNumberOfParameters, setCurNumberOfParameters, setName, toString

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

FieldSqrt

public FieldSqrt(FieldI f,
                 int num_itts)

Constructor

Parameters:

f - the field for all computations

num_itts - maximum number of iterations

Method Detail

eval

public java.lang.Object eval(java.lang.Object arg)
                      throws EvaluationException

Specified by:

eval in class UnaryFunction

Throws:

EvaluationException

getNum_itts

public int getNum_itts()

setNum_itts

public void setNum_itts(int num_itts)

toString

public java.lang.String toString()

Overrides:

toString in class PostfixMathCommand