(Updated April 4, 1997)
These models were made in Germany about 100 years ago.
They have been trimmed by the aid of some chinese students since 1996.
As for the mathematical explanation, please see a home page by N. Takeuchi.
At a dinner party for foreign students in Komaba, 18 Dec. 1996
At a dinner party for foreign students in our graduate school, 24 Jan. 1997
(guest, student1, student2, student3, faculty and office members)
At a wine party for the colloqium (Prof. H. Fujita), 24 Jan. 1997
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