
Re: How to remove external parentheses from a list
Posted:
Aug 17, 2013 1:59 AM


One way is to use Sequence with Apply (@@). For example:
Integrate[x1 + x2^2, Sequence @@ {{x1, a, b}, {x2, c, d}}]
On Aug 16, 2013, at 7:06 AM, Samuel Mark Young <sy81@sussex.ac.uk> wrote:
> > Hello, > > I'm looking for an easy way to remove the external parentheses from a list. The list contains integration variables and their respective limits, it currently looks something like this: > > {{x1,a,b},{x2,c,d},...,{xn,y,z}} > > However, the Integrate (or NIntegrate function) in Mathematica wants me to write it like this: > > {x1,a,b},{x2,c,d},...,{xn,y,z} > i.e. The external parentheses have been removed > > I've looked around online and seen suggestions for replacing the curly brackets "{" with a blank space " ", or using Apply (@@) but can't work out the correct syntax. > > Thanks for any help and advice! > > Regards, > Sam >
 Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower University of Massachusetts 710 North Pleasant Street Amherst, MA 010039305
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