## Note on Dunkl-Williams inequality with $$n$$ elements.(English)Zbl 1381.46014

Summary: Recently, J. Pečarić and R. Rajić [Math. Inequal. Appl. 10, No. 2, 461–470 (2007; Zbl 1120.26025)] established a generalization of the Dunkl-Williams inequality for $$n$$ elements in a Banach space. In this note we show a refinement of this inequality.

### MSC:

 46B20 Geometry and structure of normed linear spaces

### Keywords:

Dunkl-Williams inequality; triangle inequality

Zbl 1120.26025
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