A Study on High School Mathematics Curriculum
김주봉 Joo Bon Kim
18(1) 1-7, 1980
DOI: JANT Vol.18(No.1) 1-7, 1980
Locally S-closed Spaces
황일 Yll Hwang
18(1) 9-12, 1980
DOI: JANT Vol.18(No.1) 9-12, 1980
An Approximate Evaluation of Sin X
이내자 Nae Ja Lee
18(1) 13-16, 1980
DOI: JANT Vol.18(No.1) 13-16, 1980
Regular Ideals in an algebra Cc∞ ( Ω )
박재명 Jae Myung Park
18(1) 17-18, 1980
DOI: JANT Vol.18(No.1) 17-18, 1980
LIBERAL EXTENSION OF RINGS
이종연 Chong Yun Lee
18(1) 19-20, 1980
DOI: JANT Vol.18(No.1) 19-20, 1980
A Generalization of S . P . Singh's T-invariant Point Theorem to Approximation Theory
조열제 Yedl Je Cho
18(1) 21-23, 1980
DOI: JANT Vol.18(No.1) 21-23, 1980
In this note, I studied about involution on BCK-algebras, and solved a problem posed by K. Ise´ki [4]. The problem is following : Is there a non-commutative BCK-algebra satisfying NNχ=χ?