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)
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.