A new concept of the X-M-PN space is introduced, and the acute angle principle in the X-M-PN space is proved. Meanwhile, some new results are obtained.
文摘A new concept of the X-M-PN space is introduced, and the acute angle principle in the X-M-PN space is proved. Meanwhile, some new results are obtained.
基金the Natural Science Foundation of China(11361042,11071108)the Natural Science Foundation of Jiangxi Province of China(2010GZS0147)the Youth Foundation of theEducation Department of Jiangxi(GJJ13012)