Re: Grouping terms under the radical

*To*: mathgroup at smc.vnet.net*Subject*: [mg120120] Re: Grouping terms under the radical*From*: Alexei Boulbitch <Alexei.Boulbitch at iee.lu>*Date*: Fri, 8 Jul 2011 05:37:35 -0400 (EDT)

A straightforward answer may be like this: Sqrt[(2 n)]//HoldForm Alternatively, there is a special operator entitled CreateSubexpression in the package Presentations by David Park. However, from your question I understood you in such a way that you intend to use it as formulas in scientific or engineering texts. If I understood right and this is the case, you may have an easier solution where you will not have to struggle against the issues you are asking about. Namely, you may find comfortable to use the formats for Inline Formula, Display Formula and Display Formula Numbered in the descending menu appearing after Menu/Format/Style. They have different appearances in different StyleSheets. I personally prefer the typical for most scientific journals appearance of StyleSheet entitled JournalArticle to be found in the Menu/Format/StyleSheet/Article. As an alternative you may make your formulas programmatically to completely control various format possibilities including interactive ones or those evolving in time. It is, however, a rather long question, let us only discuss it, if needed. Have fun, Alexei This must be a classic question. When I input Sqrt[(2 n)] Mathematica displays the output as Sqrt[2] Sqrt[n] -- i.e., both 2 and n are under their own radical. The display of output doesn't change if I impose the assumption that n > 0. This is fine from a mathematical point of view, but it looks unconventional when pasted into a paper. It seems to me most authors would keep the 2 and the n under a common radical -- how can I get Mathematica to do the same? Thanks! Alexei BOULBITCH, Dr., habil. IEE S.A. ZAE Weiergewan, 11, rue Edmond Reuter, L-5326 Contern, LUXEMBOURG Office phone : +352-2454-2566 Office fax: +352-2454-3566 mobile phone: +49 151 52 40 66 44