J4 ›› 2010, Vol. 45 ›› Issue (2): 10-13.
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The definition of a sphere arrangement is given and a kind of classification method is obtained under the equivalence relation of “coaxality” in S2. Some properties of a special r coaxial sphere arrangement havebeen studied. The formulas to compute its characteristic polynomial and the number of regions are given.
Key words: sphere arrangement; special rcoaxial sphere arrangement;characteristic polynomial; number of regions
CUI Xiu-Peng, PEI Dong-He, GAO Rui-Mei. The classification of a sphere arrangement in S2andits characteristic polynomial[J].J4, 2010, 45(2): 10-13.
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