Re: Find common elements in a list of sublists

*To*: mathgroup at smc.vnet.net*Subject*: [mg125827] Re: Find common elements in a list of sublists*From*: Dana DeLouis <dana01 at me.com>*Date*: Wed, 4 Apr 2012 04:30:41 -0400 (EDT)*Delivered-to*: l-mathgroup@mail-archive0.wolfram.com

> 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? Hi. If I understand the question correctly, using Apply is what you need: d={{1,19},{1,23},{1,5,25},{1,17},{1,11},{1,5}}; Intersection@@d {1} = = = = = = = = = = HTH :>) Dana DeLouis Mac & Math 8 = = = = = = = = = = On Apr 3, 4:44 am, Cisco Lane <travl... at yahoo.com> 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?