Nothing
test_that("Trivariate example", {
x <- qlone(1)
y <- qlone(2)
z <- qlone(3)
f <- x^2 + y^2 + z^2 + 2
g <- x*y + y*z
#
Rz <- resultant(f, g, var = 3)
expect_true(Rz == y^4 + 2*x^2*y^2 + 2*y^2)
#
Ry <- resultant(f, g, var = 2)
expect_identical(involvedVariables(Ry), c(1L, 3L))
#
SRy <- principalSubresultants(f, g, var = 2)
tests <- vapply(SRy, function(qspray) {
!is.element(2L, involvedVariables(qspray))
}, logical(1L))
expect_true(all(tests))
})
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