On the critical length conjecture for spherical Bessel functions in CAGD

Ognyan Kounchev, Hermann Render

A conjecture of J.M. Carnicer, E. Mainar and J.M. Peña states that the critical length of the space $P_n\odot C_1$ generated by the functions $x^k\sin x$ and $x^k\cos x$ fo…