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  • Department News

 

 

  • Seminars and Colloquia

8/5(Wed) 15:00
Yaokun Wu(Shanghai Jiao Tong University, Shanghai, China)
Discrete Math

8/5(Wed) 16:00
Jinfang Wang(Chiba University, Japan)
Discrete Math

8/6(Thu) 15:00
Madhu Sudan(Microsoft Research New England / MIT, Cambridge, M)
Discrete Math

8/6(Thu) 15:00
Madhu Sudan(Microsoft Research New England / MIT, Cambridge, M)
Discrete Math

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  • Conferences and Workshops

8/3(Mon) ~ 8/7(Fri)
NIMS & KAIST
Conf. / Workshop

8/3(Mon) ~ 8/14(Fri)
KAIST 자연과학동 E6-1, 3435 & 고등과학원 1114 회의실
Conf. / Workshop

8/26(Wed) ~ 8/28(Fri)
1501 & 3435, Building E6-1, KAIST, Daejeon, Korea
Conf. / Workshop

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  • 2015-12 Rank
    Let \(A\) be an \(n\times n\) matrix with complex entries. Prove that if \(A^2=A^*\), then \[\operatorname{rank}(A+A^*)=\operatorname{rank}(A).\] (Here, \(A^*\) is the conjugate transpose of \(A\).) (This is the last problem of this semester. Thank you for participating KAIST Math Problem of the Week.)

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