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Math Forum » Discussions » Software » comp.soft-sys.math.mathematica

Topic: Subscript on plus expression
Replies: 16   Last Post: Dec 3, 2012 3:18 AM

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Bob Hanlon

Posts: 725
Registered: 10/29/11
Re: Subscript on plus expression
Posted: Nov 18, 2012 5:21 PM
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Format[Subscript[arg_Plus, k_]] :=
Subscript["(" <> StringJoin @@
Riffle[ToString /@ (List @@ arg),
" + "] <> ")", k]

Subscript[a + b + 2, k]


Bob Hanlon


On Sun, Nov 18, 2012 at 3:57 AM, Dave Snead <dsnead6@charter.net> wrote:
> Hi,
>
> Mathematica fails to parenthesize the a+b in
> Subscript[Plus[a,b],k]
>
> so the output looks identical to
> Plus[a,Subscript[b,k]]
>
> Is this a bug?
> Is there an option to force the parentheses?
>
> Thanks in advance,
> Dave Snead
>
>
>

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