User's Manual

412 Functions and commands
reduced_conic Takes a conic expression and returns a vector with the
following items:
• The origin of the conic
• The matrix of a basis in which the conic is reduced
• 0 or 1 (0 if the conic is degenerate)
• The reduced equation of the conic
• A vector of the conic’s parametric equations
reduced_conic(Expr, [Vector])
Example:
reduced_conic(x^2+2*x-2*y+1) returns
ref Returns the solution to a system of linear equations written in
matrix form.
ref(Matrix)
Example:
ref returns
remove Given an element and a list or vector, removes any occurrence
of that element in the list or vector and returns the result.
remove(Element, Vector) or
remove(Element, List)
Example:
remove(6,[1 2 6 7]) returns [1 2 7]
reorder Given an expression and a vector of variables, reorders the
variables in the expression according to the order given in the
vector.
reorder(Expr, Vector)
Example:
reorder(x
2
+2*x+y
2
,[y,x]) gives y
2
+x
2
+2*x
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