The effect of implantation is similar to that of cyclodialysis; howeer, the shunt proides sufficient flow resistance to eliminate the risk of hypotony.
The necessary and sufficient conditions of similarity of two idempotent matrices are proved, the idempotency of linear combinations of two idempotent matrices is discussed.
Considering the subnormal subgroups,some equivalent conditions for nilpotency of finite groups are given and a sufficient condition for nilpotency of finite groups is obtained.
Can make in gestation mammary gland gets sufficient growth, make mammary gland flocculus eventually end conduit development becomes glandule bubble, make good preparation for lactation.
Finally,from the perspective of channel coordinal,the sufficient condition of option contract coordinating the supply chain effectively in both traditional supply chain and B2B E-market is discussed.
According to this condition, some people always take it as a quillet that our country are still too impoverished to appropriate sufficient money to develop education.
By using Taylor's formula, the article deduces the sufficient condition of the existent extreme value and the necessary condition of the inexistent extreme value of trinary function.