Re: Re: Outer product in mathematica

*To*: mathgroup at smc.vnet.net*Subject*: [mg51408] Re: [mg51352] Re: Outer product in mathematica*From*: János <janos.lobb at yale.edu>*Date*: Sat, 16 Oct 2004 04:20:43 -0400 (EDT)*References*: <ckd5i8$4vj$1@smc.vnet.net> <ckllnj$err$1@smc.vnet.net> <200410150645.CAA05155@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Yesterday evening I was looking ways to find out quickly if a list of string patterns match a list of strings or not. Outer came handy. Here is a small example: In[20]:= lst={"actagagactagag","actagag","acta","gag"}; fragpatt={"*acta*","*tag*","*gag*"}; Outer[StringMatchQ[#1,#2]&,lst,fragpatt] Out[22]= {{True,True,True},{True,True,True},{True,False,False},{False,False,True} } The first sublist of the Out shows how the first element of lst measured up to the elements of fragpatt, etc... János On Oct 15, 2004, at 2:45 AM, Albert Reiner wrote: > [Jonas Sourlier <aeroswiss at gmx.net>, Thu, 14 Oct 2004 10:51:31 +0000 > (UTC)]: >> okay, thanks alot. Could it be that "outer product" in English means >> only the tensor outer product, meanwhile in German "äusseres Produkt" >> has more the sense of the antisymmetric tensor product >> ("wedge-product")? Our professor talked only about the second one... > > I have often heard the term "direktes Produkt" for what Outer does. > > Albert. > > ---------------------------------------------- Trying to argue with a politician is like lifting up the head of a corpse. (S. Lem: His Master Voice)

**References**:**Re: Outer product in mathematica***From:*Albert Reiner <areiner@tph.tuwien.ac.at>