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Re: Parenthesis reduction

  • To: mathgroup at smc.vnet.net
  • Subject: [mg126928] Re: Parenthesis reduction
  • From: awnl <awnl at gmx-topmail.de>
  • Date: Mon, 18 Jun 2012 05:44:27 -0400 (EDT)
  • Delivered-to: l-mathgroup@mail-archive0.wolfram.com
  • References: <jrlfoa$c2s$1@smc.vnet.net>

Hi,

> Which command should one use to get
> 	{a, b, c}, {d, e, f}, {g, h, i}

stricktly speaking this is not a valid mathematica expression, so it 
can't be done. But...

> from
> 	{{a, b, c}, {d, e, f}, {g, h, i}}
> ?

... you most probably want Sequence, which will create something that 
you can pass to a function:


arglist = {{a, b, c}, {d, e, f}, {g, h, i}}

argseq = Sequence@@arglist;

f[argseq]

of course you can also directly "Apply" (@@ is the shortcut for "Apply") 
the function to the list of arguments:

f@@aglist

hth,

albert



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