• To: mathgroup at smc.vnet.net
• Subject: [mg83831] Re: [mg83803] Question about exponent shorthand
• From: Murray Eisenberg <murray at math.umass.edu>
• Date: Sun, 2 Dec 2007 04:02:35 -0500 (EST)
• Organization: Mathematics & Statistics, Univ. of Mass./Amherst
• References: <200712011038.FAA28030@smc.vnet.net>

```That makes sense to me:  I would no more expect to be able to use, say
12.(34) for "readability" yet standing for 12.34 -- actually,
Mathematica would interpret the former as a product of 12. with 34 --
than I would be able to use 1*^(-5).  The direct, explicit notation for
a number doesn't allow parenthesis punctuation within in.

But if you don't want to sacrifice the readability of parentheses, you
could of course use 10^(-5).  Or, better yet, use superscripts on 10 in
StandardForm input for powers.

Curtis Osterhoudt wrote:
> Hi, all,
>
>    I've just got used to using the character shortcut *^ to stand for "times
> 10 to the power of". As expected, these two expressions work:
>    1*^5   --> 100000
>    1*^-5  --> 1/100000
>
> But putting parentheses around the exponent (as I'd prefer to do for
>
>   Input: 1*^ (-5)
>
>    Output:  Syntax::sntxb:Expression cannot begin with "1.(-5)".
>
>                  Syntax::tsntxi:"1.^" is incomplete; more input is needed.
>
>                  Syntax::sntxi:Incomplete expression; more input is needed.
>
>
> This is on
>
>  In[45]:= \$Version
>
> Out[45]= "6.0 for Linux x86 (32-bit) (June 19, 2007)"
>
>
>           Any clues?
>
>
>

--
Murray Eisenberg                     murray at math.umass.edu
Mathematics & Statistics Dept.
Lederle Graduate Research Tower      phone 413 549-1020 (H)
University of Massachusetts                413 545-2859 (W)
710 North Pleasant Street            fax   413 545-1801
Amherst, MA 01003-9305

```

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