CONTENTS OF VOLUME 31

ARRIGO CELLINA:
Some problems in the Calculus of Variations
  5  
KAROL BARON:
On orthogonally additive functions with big graphs
  57  
DARIUSZ DUDZIK, MARCIN SKRZYŃSKI:
Outer measures on a commutative ring induced by measures on its spectrum
  63  
MOHAMMED EL AZHARI:
Multipliers of uniform topological algebras
  71  
ALAATTIN ESEN, ORKUN TASBOZAN:
Numerical solution of time fractional Schrödinger equation by using quadratic B-spline finite elements
  83  
MARTIN HIMMEL:
Complementary results to Heuvers’s characterization of logarithmic functions
  99  
TEODORO LARA, JANUSZ MATKOWSKI, NELSON MERENTES, ROY QUINTERO, MAŁGORZATA WRÓBEL:
A generalization of m-convexity and a sandwich theorem
  107  
RADOSŁAW ŁUKASIK:
Invariant means on Banach spaces
  127  
AMIR HOSEIN MOKHTARI, FAHIMEH MOAFIAN, HAMID REZA EBRAHIMI VISHKI:
Lie derivations on trivial extension algebras
  141  
IMKE TOBORG, PETER VOLKMANN:
On stability of the Cauchy functional equation in groupoids
  155  
PAWEŁ WÓJCIK:
A simple proof of the Polar Decomposition Theorem
  165  
MIAN BAHADUR ZADA, MUHAMMAD SARWAR:
Fixed point results satisfying rational type contractive conditions in complex valued metric spaces – revisited
  173  
Report of Meeting.
The Seventeenth Katowice–Debrecen Winter Seminar Zakopane (Poland) ,
February 1–4, 2017
  187
 



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