Every mathematician working in Banaeh spaee geometry or Approximation theory knows, from his own experienee, that most "natural" geometrie properties may faH to
This book is an outcome of two Conferences on Ulam Type Stability (CUTS) organized in 2016 (July 4-9, Cluj-Napoca, Romania) and in 2018 (October 8-13, 2018, Tim
Inequalities play a central role in mathematics with various applications in other disciplines. The main goal of this contributed volume is to present several i
Semi-inner products, that can be naturally defined in general Banach spaces over the real or complex number field, play an important role in describing the geom