composeQspray {qspray}

Compose 'qspray' polynomials

Description

Substitutes the variables of a qspray polynomial with some qspray polynomials. E.g. you have a polynomial P(x, y) and you want the polynomial P(x^2, x+y+1) (see example).

Usage

composeQspray(qspray, listOfQsprays)

Arguments

qspray

a qspray polynomial

listOfQsprays

a list containing at least n qspray polynomials where n is the number of variables of the polynomial given in the qspray argument

Value

The qspray polynomial obtained by composing the polynomial given in the qspray argument with the polynomials given in the listOfQsprays argument.

Examples

library(qspray)
x <- qlone(1)
y <- qlone(2)
P <- x*y/2 + 4*y
X <- x^2
Y <- x + y + 1
composeQspray(P, list(X, Y)) # this is P(x^2, x+y+1)