# CentralArrangement -- class of central hyperplane arrangements

## Description

A central arrangement is a finite set of linear hyperplanes.

## Methods that use a central hyperplane arrangement :

• "deCone(CentralArrangement,RingElement)" -- see deCone -- produce an affine arrangement from a central one
• "deCone(CentralArrangement,ZZ)" -- see deCone -- produce an affine arrangement from a central one
• "der(CentralArrangement)" -- see der -- Module of logarithmic derivations
• "der(CentralArrangement,List)" -- see der -- Module of logarithmic derivations
• "isDecomposable(CentralArrangement)" -- see isDecomposable -- test if an arrangement is decomposable
• "isDecomposable(CentralArrangement,Ring)" -- see isDecomposable -- test if an arrangement is decomposable
• "lct(CentralArrangement)" -- see lct -- Compute the log-canonical threshold of an arrangement
• "multIdeal(QQ,CentralArrangement)" -- see multIdeal -- compute a multiplier ideal
• "multIdeal(QQ,CentralArrangement,List)" -- see multIdeal -- compute a multiplier ideal
• "multIdeal(ZZ,CentralArrangement)" -- see multIdeal -- compute a multiplier ideal
• "multIdeal(ZZ,CentralArrangement,List)" -- see multIdeal -- compute a multiplier ideal
• orlikSolomon(CentralArrangement,PolynomialRing) (missing documentation)
• "orlikTerao(CentralArrangement)" -- see orlikTerao -- defining ideal for the Orlik-Terao algebra
• "orlikTerao(CentralArrangement,PolynomialRing)" -- see orlikTerao -- defining ideal for the Orlik-Terao algebra
• "orlikTerao(CentralArrangement,Symbol)" -- see orlikTerao -- defining ideal for the Orlik-Terao algebra

## For the programmer

The object CentralArrangement is a type, with ancestor classes Arrangement < HashTable < Thing.