HP Prime Graphing Wireless Calculator - Manual (Page 208)

204 Functions and commands
Example:
reduced_conic(x^2+2*x-2*y+1) returns
ref Performs Gaussian reduction of a matrix.
ref(Matrix)
Example:
ref
returns
remove Given a vector or list, removes the occurrences of Value or
removes the values that make Test true and returns the
resulting vector or list.
remove(Value, List) or remove(Test, List)
Examples:
remove(5,{1,2,5,6,7,5}) returns {1,2,6,7}
remove(x→x≥5, [1 2 5 6 7 5]) returns [1 2]
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
residue Returns the residue of an expression at a value.
residue(Expr, Var, Value)
Example:
residue(1/z,z,0)
returns
1
restart Purges all the variables.
restart(NULL)
resultant Returns the resultant (i.e. the determinant of the Sylvester
matrix) of two polynomials.
resultant(Poly1, Poly2, Var)
[ ] [ ]












⋅ + ⋅ ⋅
−
⋅ − + − + ⋅ − ⋅ + − 





⋅ + ⋅ ⋅ − ⋅ − + − ⋅ + 





−
− x i x x i y x x x x i x x i x y ) (
2
1
) ( 1 1 2 2 1 . 0 4 4
2
1
1 2 1
0 1
1 0
0 1 2 2
3 1 2 –
3 2 2
1 13---
2 –
3
------
0 1 2