• East Asian mathematical journal
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• v.17 no.2
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• pp.191-195
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• 2001

The purpose of this note is to introduce various metrics and to prove the properties of given metric spaces.

• East Asian mathematical journal
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• v.21 no.2
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• pp.151-161
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• 2005

We analyze the structure of $C^*-algebras$ generated by left regular isometric representations of semigroups.

• East Asian mathematical journal
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• v.15 no.2
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• pp.345-354
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• 1999

Orthogonalization can be done by the well known Gram-Schmidt process or by using Householder transformations. In this paper, we introduced an alternative process using linear systems.

• East Asian mathematical journal
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• v.15 no.2
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• pp.177-190
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• 1999

In this work, we study permuting tri-derivations and give an example.

• East Asian mathematical journal
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• v.15 no.2
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• pp.223-232
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• 1999

In this paper, we give the upper bound of determinants of (0,1)-tridiagonal matrices and we show that the (0,1)-tridiagonal matrices which have maximal determinant are sign-nonsingular.

• East Asian mathematical journal
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• v.14 no.2
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• pp.237-247
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• 1998

In this paper, we prove a translation theorem for the analytic Feynman integral for functions in $\mathcal{F}_{A_1,A_2}$(B) and show how this integral can be modified so as to be translation invariant.

• East Asian mathematical journal
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• v.14 no.2
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• pp.269-279
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• 1998

For a codimension 1 submanifold in a Euclidean 2n-space, the degree of the gauss map mod 2 is the semi-characteristic of the manifold in $Z_2$ coefficient.

• East Asian mathematical journal
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• v.28 no.3
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• pp.347-352
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• 2012

In this paper, we introduce techniques for computations of the automorphism group of special doamins, for example the Kohn-Nirenberg domain, Fornaess domain and Cartan Hartogs domain.

• East Asian mathematical journal
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• v.16 no.2
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• pp.199-203
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• 2000

We give nine necessary and sufficient conditions for a metric space to be complete.

• East Asian mathematical journal
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• v.16 no.2
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• pp.383-390
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• 2000

This paper is to show that a submanifold of codimension 2 of an odd-dimensional sphere with an almost contact metric structure is an intersection of a complex cone with generator as a normal vector and a sphere.