• 제목/요약/키워드: Chi-seong

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BCK-대수에 관하여

  • 홍성민
    • 한국수학교육학회지시리즈A:수학교육
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    • 제19권2호
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    • pp.15-16
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    • 1981
  • In this note, I studied about involution on BCK-algebras, and solved a problem posed by K. Iseki [4]. The problem is following: Is there a non-commutative BCK-algebra satisfying NN$\chi$=$\chi$\ulcorner.

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청계산

  • 이치성
    • 공원문화
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    • 통권66호
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    • pp.85-89
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    • 1997
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