The NegExpression class.

This class represents the negation of an affine expression.

# S4 method for Expression,missing
-(e1, e2)

# S4 method for Expression,Expression
-(e1, e2)

# S4 method for Expression,ConstVal
-(e1, e2)

# S4 method for ConstVal,Expression
-(e1, e2)

# S4 method for NegExpression
dim_from_args(object)

# S4 method for NegExpression
sign_from_args(object)

# S4 method for NegExpression
is_incr(object, idx)

# S4 method for NegExpression
is_decr(object, idx)

# S4 method for NegExpression
is_symmetric(object)

# S4 method for NegExpression
is_hermitian(object)

# S4 method for NegExpression
graph_implementation(object, arg_objs, dim, data = NA_real_)

Arguments

e1, e2

The Expression objects or numeric constants to subtract.

object

A NegExpression object.

idx

An index into the atom.

arg_objs

A list of linear expressions for each argument.

dim

A vector representing the dimensions of the resulting expression.

data

A list of additional data required by the atom.

Methods (by generic)

• dim_from_args(NegExpression): The (row, col) dimensions of the expression.

• sign_from_args(NegExpression): The (is positive, is negative) sign of the expression.

• is_incr(NegExpression): The expression is not weakly increasing in any argument.

• is_decr(NegExpression): The expression is weakly decreasing in every argument.

• is_symmetric(NegExpression): Is the expression symmetric?

• is_hermitian(NegExpression): Is the expression Hermitian?

• graph_implementation(NegExpression): The graph implementation of the expression.