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Re: How to =B1?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg103696] Re: How to =B1?
  • From: Peter Breitfeld <phbrf at t-online.de>
  • Date: Fri, 2 Oct 2009 08:31:51 -0400 (EDT)
  • References: <ha2113$n6o$1@smc.vnet.net>

olliH wrote:

> Hi how do I make an expression with the =B1 Operator?
>
> In = x =B1 1
> Out = {x+1,x-1}
>
> (=B1 is the plus/minus symbol if this does not show up
> properly - moderator)
>

Try this:

PlusMinus[x_,y_]:=Flatten[x+y,x-y]

Test:

x ± 3       gives {3+x,-3+x}

x ± 3 ± 7   gives {10 + x, 4 + x, -4 + x, -10 + x}

-- 
_________________________________________________________________
Peter Breitfeld, Bad Saulgau, Germany -- http://www.pBreitfeld.de


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