曹的简历是这样写的：
August 2003 - Present
A. Everett Pitcher Professor, Lehigh University
January 2002 - June 2003
Associate Director, Institute for Pure and Applied Mathematics (IPAM) at UCLA
September 1999 - August 2004
Professor, Texas A&M University
September 1993 - August 1999
Associate Professor, Texas A&M University
看上去更像是在Texas A&M拿到Tenure以后再跳到Lehigh的。到现在也不过两年，就算是牛人也没牛到这么快Tenure吧？这个职位我也说了一般是荣誉性质的。是不是铁饭碗那还不一定。