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fricas
)clear all
All user variables and function definitions have been cleared.
variables (2*x+1/x)$DMP([x], EXPR INT) (1) Type: List(OrderedVariableList([x])) fricas variables (2*y+1/y)$DMP([y], INT)
There are 4 exposed and 6 unexposed library operations named
variables having 1 argument(s) but none was determined to be
applicable. Use HyperDoc Browse, or issue
)display op variables
package-calling the operation or using coercions on the arguments
will allow you to apply the operation.
Cannot find a definition or applicable library operation named
variables with argument type(s)
Fraction(Polynomial(Integer))
Perhaps you should use "@" to indicate the required return type,
or "$" to specify which version of the function you need. a:=(2*x+1/x)$DMP([x], EXPR INT); variables a (2)
Type: List(OrderedVariableList([x]))
fricas
b:=(2*y+1/y)$DMP([y], INT); variables b There are 11 exposed and 8 unexposed library operations named + having 2 argument(s) but none was determined to be applicable. Use HyperDoc Browse, or issue )display op + to learn more about the available operations. Perhaps package-calling the operation or using coercions on the arguments will allow you to apply the operation. Cannot find a definition or applicable library operation named + with argument type(s) DistributedMultivariatePolynomial([y],Integer) Fraction(DistributedMultivariatePolynomial([y],Integer)) Perhaps you should use "@" to indicate the required return type, or "$" to specify which version of the function you need.
x:DMP([x], EXPR INT):=x; variables (2*x+1/x) (3)
Type: List(OrderedVariableList([x]))
fricas
y:DMP([y], INT):=y; variables (2*y+1/y) (4)
Type: List(Symbol)

Possible Explanations: see SandBoxPolynomialQuizExplained

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