Assistant Professor
Department of Mathematics
Community College of Philadelphia
1700 Spring Garden Street
Philadelphia, PA 19130
Office: B1-9D
Phone: 215-751-8317
E-mail: yyoo@ccp.edu
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My Ph.D. Thesis can be found here
Frustration is an inevitable part of any mathematician's work.
I would even say it is perfectly normal. But we will not give up.