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Generalized Chebyshev Polynomials Associated with Affine Weyl Groups

1988
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Transactions of the American Mathematical Society
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We begin with a compact figure that can be folded into smaller replicas of itself, such as the interval or equilateral triangle. Such figures are in one-to-one correspondence with affine Weyl groups. For each such figure in n-dimensional Euclidean space, we construct a sequence of polynomials P/c: Rn -► Rn so that the mapping P^ is conjugate to stretching the figure by a factor A; and folding it back onto itself. If re = 1 and the figure is the interval, this construction yields the Chebyshev

doi:10.2307/2000951
fatcat:iuwqmk2g4bcqxdk5kmdrmvcmfi