ultraspherical en · ADJ
Etymology
From ultra- + spherical.
Meanings
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(not-comparable) Related to or involving a Gegenbauer polynomial.
Thus, an estimate for 0 < v < 1, can be derived from theorem 6.6.1, by noting that v is an ultraspherical weight function, whose exponent is negative.
2008, Daniele Funaro, Polynomial Approximation of Differential Equations, →ISBN, page 116:We develop a spectral method for solving univariate singular integral equations over unions of intervals by utilizing Chebyshev and ultraspherical polynomials to reformulate the equations as almost-banded infinite-dimensional systems.
2015, Richard Mikael Slevinsky, Sheehan Olver, “A fast and well-conditioned spectral method for singular integral equations”, in (Please provide the book title or journal name):