// OTHER
variables arrVariables ideal generated by the variables the arr depends on
nvars arrNvars number of variables the arr depends on
delete arrDelete deletes hyperplanes by indices
print arrPrint prints the arr on the screen
// IDEAL INHERITED FUNCTIONS
homog arrHomog checks if arrangement is homogeneous
simplify arrSimplify simplifies arrangement
size arrSize number of planes
subst arrSubst substitute variables
// MULTI-ARRANGEMENTS
= multarrAdd assignment of multarr
+ multarrAdd union of multarr
poly multarr2poly defining polynomial
size multarrSize number of hyperplanes with mult.
print multarrPrint displays multiarr
delete multarrDelete deletes hyperplane