Jensen-type geometric shapes

Paweł Pasteczka

Abstract


We present both necessary and sufficient conditions for a convex closed shape such that for every convex function the average integral over the shape does not exceed the average integral over its boundary.

It is proved that this inequality holds for n-dimensional parallelotopes, n-dimensional balls, and convex polytopes having the inscribed sphere (tangent to all its facets) with the centre in the centre of mass of its boundary.


Keywords


Shapes; Platonic shapes; sphere; ball; Jensen's inequality

Mathematics Subject Classification (2010)


39B62; 52B10; 52B11; 52A05

References


de la Cal, Jesús and Javier Cárcamo. "Multidimensional Hermite-Hadamard inequalities and the convex order." J. Math. Anal. Appl. 324, no. 1 (2006): 248-261.

de la Cal, Jesús, Javier Cárcamo and Luis Escauriaza. "A general multidimensional Hermite-Hadamard type inequality." J. Math. Anal. Appl. 356, no. 2 (2009): 659-663.

Cover, Thomas M. and Joy A. Thomas. Elements of Information Theory 2nd ed. New York: Wiley-Interscience, 2006.

Dragomir, Sever Silvestru and Charles E. M. Pearce. Selected Topics on Hermite-Hadamard Inequalities. Victoria University: RGMIA Monographs, 2000.

Niculescu, Constantin P. "The Hermite-Hadamard inequality for convex functions of a vector variable." Math. Inequal. Appl. 5, no. 4 (2002): 619–623.

Niculescu, Constantin P. and Lars-Erik Persson. Convex Functions and their Applications. A Contemporary Approach, 2nd Ed. Vol. 23 of CMS Books in Mathematics. New York: Springer-Verlag, 2018.


Full Text: PDF

Download statistics: 601

Licencja Creative Commons
This article by Paweł Pasteczka is governed by the Creative Commons Attribution-ShareAlike 4.0 International(CC BY-SA 4.0) licence.


e-ISSN: 2300-133X, ISSN: 2081-545X

Since 2017 Open Access in De Gruyter and CrossCheck access cofinanced by The Ministry of Science and Higher Education - Republic of Poland - DUN 775/P-DUN/2017 see more

The Journal is indexed in:
and others see Abstracting and Indexing list

AUPC SM is on the List of the Ministry’s scored journals with 20 points for 2019

Deklaracja dostępności cyfrowej