projectively

Projectively flat totally real minimal submanifolds in CP^4 is studied. The infimum of volume and its necessary and sufficient condition are obtained.

摘研究了复射影空间的射影平坦、全实极小子流形，得到了体积下确界与达到下确界的充件。

Base sheet and electrode conductor is projectively welded to overcome sticking problem between electrodes of AA type charging batt e ry. The procedure is applied to production.

采用多点凸焊工解决了AA型可充片与极耳点焊时粘连极的问题,并将其应用于生产,效果很好。