org.matheclipse.core.reflection.system

Class Gamma

java.lang.Object

org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

org.matheclipse.core.eval.interfaces.AbstractTrigArg1

org.matheclipse.core.reflection.system.Gamma

All Implemented Interfaces:

IFunctionEvaluator, IEvaluator

public class Gamma
extends AbstractTrigArg1

Returns the Gamma function value. See Gamma functio

Constructor Summary

Constructors

Constructor and Description
Gamma()

Method Summary

Modifier and Type	Method and Description
IExpr	evaluate(IAST ast) Symbolic evaluation of a function.
IExpr	evaluateArg1(IExpr arg1)
static java.math.BigInteger	gamma(java.math.BigInteger biggi)
IExpr	numericEvalD1(Num arg1) Evaluate this function for one double argument
IExpr	numericEvalDC1(ComplexNum arg1) Evaluate this function for one double complex argument
void	setUp(ISymbol symbol) Evaluate built-in rules and define Attributes for a function.

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractTrigArg1

numericEval, numericEvalArg1

Methods inherited from class org.matheclipse.core.eval.interfaces.AbstractFunctionEvaluator

createRuleFromMethod, getPeriodicParts, getPureImaginaryPart, getRuleAST, isNegativeExpression

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

Gamma

public Gamma()

Method Detail

evaluate

public IExpr evaluate(IAST ast)

Description copied from class: AbstractFunctionEvaluator

Symbolic evaluation of a function. ast.get(0) contains the head (i.e. the function symbol) of this abstract syntax tree (AST). ast.get(1) to ast.get(n) contains the first to n-th argument of the function.
If necessary use the methods from the Validate class to check the number or types of arguments in the evaluate method.
Note: if the symbolic evaluation isn't possible or no result is found the evaluate method returns with a null value without throwing an exception!

Specified by:

evaluate in interface IFunctionEvaluator

Overrides:

evaluate in class AbstractTrigArg1

Parameters:

ast - the abstract syntax tree (AST) which should be evaluated

Returns:

the evaluated object or null, if evaluation isn't possible

See Also:

Validate

numericEvalD1

public IExpr numericEvalD1(Num arg1)

Description copied from class: AbstractTrigArg1

Evaluate this function for one double argument

Overrides:

numericEvalD1 in class AbstractTrigArg1

Parameters:

arg1 - a double number

Returns:

numericEvalDC1

public IExpr numericEvalDC1(ComplexNum arg1)

Description copied from class: AbstractTrigArg1

Evaluate this function for one double complex argument

Overrides:

numericEvalDC1 in class AbstractTrigArg1

Parameters:

arg1 - a double complex number

Returns:

gamma

public static java.math.BigInteger gamma(java.math.BigInteger biggi)

evaluateArg1

public IExpr evaluateArg1(IExpr arg1)

Overrides:

evaluateArg1 in class AbstractTrigArg1

setUp

public void setUp(ISymbol symbol)
           throws SyntaxError

Description copied from class: AbstractFunctionEvaluator

Evaluate built-in rules and define Attributes for a function.

Specified by:

setUp in interface IEvaluator

Overrides:

setUp in class AbstractFunctionEvaluator

Parameters:

symbol - the symbol which should be set up

Throws:

SyntaxError