Turán's inequalities
From Infogalactic: the planetary knowledge core
In mathematics, Turán's inequalities are some inequalities for Legendre polynomials found by Paul Turán (1950) (and first published by Szegö (1948)). There are many generalizations to other polynomials, often called Turán's inequalities, given by (E. F. Beckenbach, W. Seidel & Otto Szász 1951) and other authors.
If Pn is the nth Legendre polynomial, Turán's inequalities state that
For Hn, the nth Hermite polynomial, Turán's inequalities are
whilst for Chebyshev polynomials they are
See also
References
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