poly_sort

poly_sort(F)

: It expands F with a given variables v=V and a given weight w=W. It returns a quote object. If trucate option is set, the expansion is truncated at the given degree.

poly_sort(F | v=key0,w=key1,truncate=key2)

: This function allows optional variables v, w, truncate

Example:

 poly_sort((x-y-a)^3 | v=[x,y], w=[-1,-1])  
    returns a series expansion in terms of x and y.

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