Professor Y.C. Wong— Four decades

as my mentor, colleague

and friend

SIU Man Keung

Department of Mathematics

University of Hong Kong

October 23, 1998

HKU

October 1963

HKU

UNIVERSITY OF HONG KONGDEPARTMENT OF MATHEMATICS

I. Five Main Steps in Studying Mathematics

1 . Preparing before the lecture.2 . Attending the lecture.3 . Reviewing after the lecture.4 . Doing exercises.5 . Looking back.

• • • • • • •

1/10/YCW/1w/63

Two theorems in thefirst year lectures :

American Mathematical Monthly, 48 (1941), 530-535.

Y.C. Wong, Some properties of the triangle, American Mathematical Monthly, 48 (1941), 530-535.

Y.C. Wong, Some extensions of the Douglas-Neumann theorem for concentric polygons, American Mathematical Monthly, 75 (1968), 470-482.

S.B. Gray, Generalizing the Petr-Douglas-Neumann theorem on N-gons, American Mathematical Monthly, 110 (2003), 210-227.

June 1970

New York

March 1967

New York

July 1970

Peak of Otters, Virginia

June 1972

New York

Thank you very much indeed for your most interesting and informative letter of October 11, 1969.

………

I appreciate very much your taking the trouble to write us such a long letter. It must have taken you two or three hours of your valuable time. Perhaps you should arrange among yourselves to take turn to do this.

Letter from Professor Y.C. WongOctober 17, 1969.

You said you are a beginning teacher, but what you said in that letter as well as an earlier one about what a teacher should do is very similar to what I learn from my long experience as a teacher. If you keep on using your imagination and experimenting in this way, you may some day become an outstanding teacher of mathematics.

Letter from Professor Y.C. WongNovember 29, 1972.

July 1982

Vancouver

August 1978

Helsinki

欣逢黃教授九十華誕謹祝教授健康長壽，永遠幸福。

莫錦屏 2003.5.20

December 1965

HKU

December 1965

HKU

December 1965

HKU

…… Therefore thank you again, Professor Wong, and best wishes. Your six decades as mathematician and educator have touched on many lives, and mine is one of them.

Lai Tze-LeungMay 21, 2003

September 1968New York

Happy Birthday and Many Happy Returns, Professor Wong!

Best Wishes to You,Professor Wong andMrs. Wong!