Nothing
test_that("Macdonald J-polynomial", {
n <- 3
macJpoly <- MacdonaldPol(n, c(2, 1), "J")
q <- qlone(1)
t <- qlone(2)
mus <- list(3, c(2, 1), c(1, 1, 1))
qtKFpolys <- list(t, 1 + q*t, q)
tSchurPolys <- lapply(1:3, function(i) {
qtKFpolys[[i]] * changeParameters(tSchurPol(n, mus[[i]]), list(t))
})
expected <- Reduce(`+`, tSchurPolys)
expect_true(macJpoly == expected)
})
test_that("Skew Macdonald J-polynomial at q=0", {
n <- 3
lambda <- c(3, 2)
mu <- c(2, 1)
skewHLpoly <- SkewHallLittlewoodPol(n, lambda, mu, "Q")
skewMacPolyJ <- SkewMacdonaldPol(n, lambda, mu, "J")
q <- qlone(1)
t <- qlone(2)
expected <-
changeParameters(
changeParameters(
skewMacPolyJ, list(qzero(), t)
),
list(t, q)
)
expect_true(skewHLpoly == expected)
})
test_that("Macdonald J-polynomials branching rule", {
nx <- 2
ny <- 2
lambda <- c(2, 2)
macJpoly <- MacdonaldPol(nx + ny, lambda, "J")
lones <- list(Qlone(3), Qlone(4))
mus <- list(integer(0), 1, 2, c(1, 1), c(2, 1), c(2, 2))
expected <-
Reduce(
`+`,
lapply(mus, function(mu) {
SkewMacdonaldPol(nx, lambda, mu, "J") *
changeVariables(MacdonaldPol(ny, mu, "J"), lones)
})
)
expect_true(macJpoly == expected)
})
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