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The Maxima on-line user's manual

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Ratvars

Function: ratvars (<x_1>, ..., <x_n>)

Function: ratvars () -- System variable: ratvars Declares main variables <x_1>, ..., <x_n> for rational expressions. <x_n>, if present in a rational expression, is considered the main variable. Otherwise, <x_[n-1]> is considered the main variable if present, and so on through the preceding variables to <x_1>, which is considered the main variable only if none of the succeeding variables are present.

If a variable in a rational expression is not present in the ratvars list, it is given a lower priority than <x_1>.

The arguments to ratvars can be either variables or non-rational functions such as sin(x).

The variable ratvars is a list of the arguments of the function ratvars when it was called most recently. Each call to the function ratvars resets the list. ratvars () clears the list.

There are also some inexact matches for ratvars. Try ?? ratvars to see them.

(%o1)                                true
(%i2) 

Related Examples

ratvars

? ratvars ;

Calculate

ratvars

? ratvars ;

Calculate