球面和射影平面上不可分地图的色和

李赵祥;任婧;徐世英;刘彦佩

Chromatic Sums of Nonseparable Maps on the Sphere and the Projective Plane

LI Zhaoxiang;REN Jing;XU Shiying;LIU Yanpei

系统科学与数学 . 2009, (7): 877 -887 . DOI: 10.12341/jssms08427