讨论了孤立韧度与图的分数(g,f)-因子的存在性的关系,证明了当a≡b(mod2)且δ(G)和I(G)都不小于(a+b)^2+2(b-a)/4a,或者当n≠b(mod2),δ(G)和I(G)都不小于(a+b)^2+2(b-a)+1/4a时,图G有分数(g,f)-因子。
The relationship between isolated toughness and existence of fractional (g, f)-factors is considered. It is proved that a graph G has a fractional (g, f)-factor if δ(G) and I(G) are not less than (a+b)^2+2(b-a)/4a when a≡b(mod2) or δ(G) and I(G) are not less than (a+b)^2+2(b-a)+1/4a when a≠b( mod2).