The author introduces the concepts of α--fuzzy subalgebra of BCK - algebra,α--fuzzy ideal of BCK - algebra,α--left reduced ideal of BCK- algebra and discusses some of their features. These features improve and generalizes many important results obtained elsewhere.%作者引进了BCK-代数的α--fuzzy子代数、α--fuzzy理想、α--fuzzy约化左理想等概念,讨论了它们的一些性质,改进并推广了现知的一些重要结果.
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