Re: Find common elements in a list of sublists

*To*: mathgroup at smc.vnet.net*Subject*: [mg125822] Re: Find common elements in a list of sublists*From*: Helen Read <readhpr at gmail.com>*Date*: Wed, 4 Apr 2012 04:28:51 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com*References*: <jleda1$gjk$1@smc.vnet.net>

On 4/3/2012 4:44 AM, Cisco Lane wrote: > Suppose I have a list of sublists: > > d={{1, 19}, {1, 23}, {1, 5, 25}, {1, 17}, {1, 11}, {1, 5}} > > How do I find the elements common to all the sublists? > > I can do it using intersection: > > Intersection[dx[[1]], dx[[2]], dx[[3]], dx[[4]], dx[[5]], dx[[6]]] > > which yields, correctly, {1}, but what if the number of sublists in d is variable? > MapThread[Intersection, d, 0] -- Helen Read University of Vermont