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This note provides a counterexample to demonstrate some flaws in a recent paper by Chen et al. It pinpoints the logic error in the proof of Theorem 5.2 and discusses some remedial works.
$$L\circ U$$ L ∘ U -factorization was recently used to solve the max-product fuzzy relation equation by Molai (Inf Sci 234:86–96, 2013). Considering the forward and backward substitutions play an important role in this method, this paper firstly amend the forward and backward substitutions for solving max-product fuzzy relation equation with $$L\circ U$$ L ∘ U -factorization. And then,...
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