HOME PAGE of Seiichi UDAGAWA


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      Home Page of Seiichi UDAGAWA

    1. List of papers(only Mathematical ones)


Costa surface costa surface jpeg file 19K
Computer-aided discovery of new minimal surface.

Torus torusvar jpeg file 20K
Taking a line outside a circle of constant radius as an axe of revolution, one revolves the circle around the line variating the radius along the the circle. Then one obtains a surface of this kind as orbit of the circle.
Catenoid@ Catenoid jpeg file 20K
Consider the case where you have a line segment by your both hands. When you loose the line segment, Gravity makes it a curve, which is called a Catenary. Catenoid is a surface of revolution, which is obtained by revolving the Catenary around some axe. In general, a surface spanning a fixed boundary which has minimal area is called minimal surface. Catenoid is a minimal surface spanning two discs. This is only a minimal surface of revolution.
Minimal Surface@ Interesting Minimal Surface jpeg file 20K
This is a computer-aided discovery of a new minimal surface.

Links

    Tokyo metropolitan University, center of preprints in Differential Geometry

    Dep.of Math. University of Bath, preprints

    preprints in GANG, MIT

    HomePage of Ian McIntosh

    preprints in Max-Planck-Institute

    preprints in MSRI, dg-ga

    Dep of Math., Duke University, preprints

    Dep. of Math., Harvard University

    Records and memories of Hiroshima atomic bomb

E-mail address :

Seiichi UDAGAWA :
sudagawa@med.nihon-u.ac.jp