If , then
See also Minkowski Sum Inequality
References
Abramowitz, M. and Stegun, C. A. (Eds.).
Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, 9th printing.
New York: Dover, p. 11, 1972.
Gradshteyn, I. S. and Ryzhik, I. M. Tables of Integrals, Series, and Products, 5th ed. San Diego, CA:
Academic Press, p. 1099, 1993.
Hardy, G. H.; Littlewood, J. E.; and Pólya, G. Inequalities, 2nd ed. Cambridge, England: Cambridge
University Press, pp. 146-150, 1988.
Minkowski, H. Geometrie der Zahlen, Vol. 1. Leipzig, Germany: pp. 115-117, 1896.
Sansone, G. Orthogonal Functions, rev. English ed. New York: Dover, p. 33, 1991.