# HOME PAGE of Seiichi UDAGAWA

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costa surface jpeg file 19K

Computer-aided discovery of new minimal surface.

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.

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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.

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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**