besselian

• With the contribution in [ 14 ], we reach the following : vn ( i ) riesz basis and riesz frame are frames which satisfied projection method, the inverse is not true . ( ii ) besselian frame need n't satisfied projection method . ( iii ) riesz basis is both riesz frame and besselian frame
  首先给出riesz基、bcsselian框架、riesz框架，投影法可行框架的定义和相应等价说法，在投影法可行框架是条件riesz框架([14])和强投影法可行框架一定是投影法可行框架的基础上得到：(?)riesz基，riesz框架是投影法可行框架，但反之不成立。