A comment on “FUZZY GRAHPS ON COMPOSITION, TENSOR AND NORMAL PRODUCTS”

M. Rostamy Malkhalifeh

Abstract


In a paper in this journal by Nirmala and Vijaya [Fuzzy graphs on
Composition, Tensor and Normal products, 2(2012)1-7], some operations on two
fuzzy graphs
were defined and the degree of a vertex in fuzzy graphs were obtained.
They also proved some properties on fuzzy graphs and illustrated these properties
through examples.
The purpose of this paper is to show by examples that some definitions and
theorems in mentioned paper contain some flaws and in general they are not true.

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