GraphComplement doesn't work in 7.0

*To*: mathgroup at smc.vnet.net*Subject*: [mg97063] GraphComplement doesn't work in 7.0*From*: Tangerine Luo <tangerine.luo at gmail.com>*Date*: Wed, 4 Mar 2009 07:12:53 -0500 (EST)

I find some functions do not work in mathematica 7.0. Why? are some function not implemented yet? << Combinatorica` In[4]:= GraphComplement[{1 -> 2}] Out[4]= GraphComplement[{1 -> 2}]

**Follow-Ups**:**Re: GraphComplement doesn't work in 7.0***From:*Murray Eisenberg <murray@math.umass.edu>