On 2018-04-18, Wolfgang Engelmann wrote: > Am 18.04.2018 um 19:11 schrieb Guenter Milde: >> On 2018-04-16, Wolfgang Engelmann wrote: >>> Am 16.04.2018 um 10:06 schrieb Wolfgang Engelmann:
>>>> I select in lyx (2.3.0) in math >>>> \lambda_{max}=528nm >>>> but get in the pdf output >>>> ̆max = 528nm >>>> why? (Debian stretch) >> Can you test with View>Source whether the "mathpazo" package is used? > I could, however, not find View>source, to check for mathpazo > I am using Lyx2.3.0 Debian/TeXlive2017 > perhaps this is what you ment: > Code-preview pane Yes, the name was changed. > it showed > $\mathrm{\lambda_{max}=528nm}$ Now, if you change in the code preview the "viewport" (second drop-down list on the left) from [Current Paragraph] to [Complete Source] or [Preamble only], you will be able to see the LyX-written LaTeX preamble. With Document>Settings>Fonts as Roman: Palatino Sans Default TT Default Math: Automatic I get the preamble: \documentclass[english]{article} \usepackage{mathpazo} \usepackage[T1]{fontenc} \usepackage[latin9]{inputenc} \usepackage{babel} i.e. there is no need for > \usepackage{mathpazo} in the custom LaTeX preamble (Document>Settings>LaTeX Preamble). >> You can also try with setting Fonts>Mathematics: Times Roman New TX > I tried this, but \lambda is not shown Now found the difference: You put \lambda in \mathrm. Unfortunately, support for upright Greek letters in mathematics is limited in traditional TeX. Standard TeX and most mathematical packages use either italic Greek characters or a text font without Greek letters with \mathrm. This is why you get an italic lambda with LatinModern or Times but a wrong (text) character with Palatino. For background and details, see http://mirrors.ctan.org/macros/latex/contrib/isomath/isomath.html#oml-font-encoding Do you really want an *upright* Lambda? This would indicate a constant value or a physical unit (see, e.g. http://old.iupac.org/standing/idcns/italic-roman_dec99.pdf). If you put only the "max" and the unit into \mathrm, everything should be fine (except for the missing space between value and unit). Otherwise, see http://mirrors.ctan.org/macros/latex/contrib/isomath/isomath.html#how-to-get-upright-small-greek-letters for options to get upright Greek in 8-bit LaTeX maths or use non-TeX fonts with Xe/LuaTeX. regards, Günter