Package net.sf.tweety.logics.fol.syntax

Class Negation

java.lang.Object

net.sf.tweety.logics.commons.syntax.RelationalFormula

net.sf.tweety.logics.fol.syntax.FolFormula

net.sf.tweety.logics.fol.syntax.Negation

All Implemented Interfaces:

net.sf.tweety.commons.Formula, net.sf.tweety.logics.commons.syntax.interfaces.ClassicalFormula, net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula, net.sf.tweety.logics.commons.syntax.interfaces.Conjunctable, net.sf.tweety.logics.commons.syntax.interfaces.Disjunctable, net.sf.tweety.logics.commons.syntax.interfaces.Invertable, net.sf.tweety.logics.commons.syntax.interfaces.LogicStructure, net.sf.tweety.logics.commons.syntax.interfaces.ProbabilityAware, net.sf.tweety.logics.commons.syntax.interfaces.QuantifiedFormula, net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

public class Negation
extends FolFormula

The classical negation of first-order logic.

Author:

Matthias Thimm

Constructor Summary

Constructors

Constructor	Description
Negation(net.sf.tweety.logics.commons.syntax.RelationalFormula formula)

Method Summary

Modifier and Type	Method	Description
Negation	clone()
FolFormula	collapseAssociativeFormulas()	This method collapses all associative operations appearing in this term, e.g.
boolean	containsQuantifier()
boolean	equals(Object obj)
Set<FolAtom>	getAtoms()
FolFormula	getFormula()
Set<net.sf.tweety.logics.commons.syntax.Functor>	getFunctors()
Set<? extends net.sf.tweety.logics.commons.syntax.Predicate>	getPredicates()
Set<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>>	getTerms()
<C extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> Set<C>	getTerms(Class<C> cls)
Set<net.sf.tweety.logics.commons.syntax.Variable>	getUnboundVariables()
int	hashCode()
boolean	isClosed()
boolean	isClosed(Set<net.sf.tweety.logics.commons.syntax.Variable> boundVariables)
boolean	isDnf()	Checks whether this formula is in disjunctive normal form.
boolean	isLiteral()
boolean	isWellBound()
boolean	isWellBound(Set<net.sf.tweety.logics.commons.syntax.Variable> boundVariables)
Negation	substitute(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> v, net.sf.tweety.logics.commons.syntax.interfaces.Term<?> t)
FolFormula	toNnf()	Makes the negation normal form of this formula.
String	toString()

Methods inherited from class net.sf.tweety.logics.fol.syntax.FolFormula

combineWithAnd, combineWithOr, complement, getQuantifierVariables, getSignature, getUniformProbability, toDnf

Methods inherited from class net.sf.tweety.logics.commons.syntax.RelationalFormula

allGroundInstances, allSubstitutions, containsTermsOfType, exchange, getPredicateCls, getSatisfactionRatio, isGround, isWellFormed, substitute

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

Negation

public Negation(net.sf.tweety.logics.commons.syntax.RelationalFormula formula)

Method Detail

getFormula

public FolFormula getFormula()

Specified by:

getFormula in interface net.sf.tweety.logics.commons.syntax.interfaces.QuantifiedFormula

Overrides:

getFormula in class net.sf.tweety.logics.commons.syntax.RelationalFormula

getPredicates

public Set<? extends net.sf.tweety.logics.commons.syntax.Predicate> getPredicates()

getFunctors

public Set<net.sf.tweety.logics.commons.syntax.Functor> getFunctors()

Specified by:

getFunctors in class net.sf.tweety.logics.commons.syntax.RelationalFormula

getAtoms

public Set<FolAtom> getAtoms()

Specified by:

getAtoms in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Specified by:

getAtoms in class net.sf.tweety.logics.commons.syntax.RelationalFormula

containsQuantifier

public boolean containsQuantifier()

isClosed

public boolean isClosed()

substitute

public Negation substitute(net.sf.tweety.logics.commons.syntax.interfaces.Term<?> v,
                           net.sf.tweety.logics.commons.syntax.interfaces.Term<?> t)
                    throws IllegalArgumentException

Specified by:

substitute in interface net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula

Specified by:

substitute in class FolFormula

Throws:

IllegalArgumentException

isClosed

public boolean isClosed(Set<net.sf.tweety.logics.commons.syntax.Variable> boundVariables)

getUnboundVariables

public Set<net.sf.tweety.logics.commons.syntax.Variable> getUnboundVariables()

isWellBound

public boolean isWellBound()

isWellBound

public boolean isWellBound(Set<net.sf.tweety.logics.commons.syntax.Variable> boundVariables)

isLiteral

public boolean isLiteral()

toString

public String toString()

Specified by:

toString in class net.sf.tweety.logics.commons.syntax.RelationalFormula

hashCode

public int hashCode()

Specified by:

hashCode in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Specified by:

equals in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Overrides:

equals in class Object

isDnf

public boolean isDnf()

Description copied from class: FolFormula

Checks whether this formula is in disjunctive normal form.

Specified by:

isDnf in class FolFormula

Returns:

"true" iff this formula is in disjunctive normal form.

toNnf

public FolFormula toNnf()

Description copied from class: FolFormula

Makes the negation normal form of this formula.

Specified by:

toNnf in class FolFormula

Returns:

the NNF of this formula

collapseAssociativeFormulas

public FolFormula collapseAssociativeFormulas()

Description copied from class: FolFormula

This method collapses all associative operations appearing in this term, e.g. every a||(b||c) becomes a||b||c.

Specified by:

collapseAssociativeFormulas in class FolFormula

Returns:

the collapsed formula.

getTerms

public Set<net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> getTerms()

getTerms

public <C extends net.sf.tweety.logics.commons.syntax.interfaces.Term<?>> Set<C> getTerms(Class<C> cls)

clone

public Negation clone()

Specified by:

clone in interface net.sf.tweety.logics.commons.syntax.interfaces.ComplexLogicalFormula

Specified by:

clone in interface net.sf.tweety.logics.commons.syntax.interfaces.SimpleLogicalFormula

Specified by:

clone in class FolFormula