Antisymmetrizing the actions of hand triple contained in volume operator and grasping on the segments rooting through any-valent vortex of spin netwok,and using the binor identity,a proof is given that all these actions are eigenactions with eigenvalue-2.

The changing laws of the compression stress and shear stress in the bottom slice coal body and regenerated roof are analysed by using two-dimensional finite element method,and the essential cause of roof accidents on the shearer track and accidents of the supports advancing are also discussed.

This paper present four new records of genus Cladosporium in China: C.