有限维空间上的椭圆框架
Ellipsoidal frames in finite dimensional Hilbert spaces

研究有限维Hilbert空间上的椭圆框架，给出了对偶椭圆框架的刻画，并得到了两个椭圆框架之和何时仍是一个椭圆框架的条件.
This research focus on ellipsoidal frames in finite dimensional Hilbert spaces. The characterization of dual ellipsoidal frame is given and the conditions on when the sum of two ellipsoidal frames is still a ellipsoidal frame are presented