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  • P-ISSN1226-0657
  • E-ISSN2287-6081
  • KCI

BOHR’S INEQUALITIES IN n-INNER PRODUCT SPACES

Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics / Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics, (P)1226-0657; (E)2287-6081
2007, v.14 no.2, pp.127-137
Cheung, W.S.
Cho, Y.S.
Pecaric, J.
Zhao, D.D.

Abstract

The classical Bohr's inequality states that <TEX>$|z+w|^2{\leq}p|z|^2+q|w|^2$</TEX> for all <TEX>$z,\;w{\in}\mathbb{C}$</TEX> and all p, q>1 with <TEX>$\frac{1}{p}+\frac{1}{q}=1$</TEX>. In this paper, Bohr's inequality is generalized to the setting of n-inner product spaces for all positive conjugate exponents <TEX>$p,\;q{\in}\mathbb{R}$</TEX>. In. In particular, the parallelogram law is recovered and an interesting operator inequality is obtained.

keywords
Bohr's inequality, n-inner product space, n-normed linear space

Journal of the Korean Society of Mathematical Education Series B: The Pure and Applied Mathematics