About author:DOU Yan-ni(1978-), female, native of Xi'an, Shaanxi, an associate professor of Shaanxi Normal
University, Ph.D., engages in operator theory and operator algebra; DU Hong-ke(1942-), male, native of Xi'an, Shaanxi, a professor of Shaanxi Normal University, Ph.D. adviser, engages in operator theory and operator algebra.
Supported by:
Supported by the National Natural Science Foundation of China(11571211,11301318,11171197,11471200)； Supported by the Fundamental Research Funds for the Central Universities(GK201301007)；
DOU Yan-ni, LI Chen-xin, LI Rong, DU Hong-ke. The Interior of Numerical Ranges of Operators[J]. Chinese Quarterly Journal of Mathematics, 2015, 30(4): 624-632.
