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3

You should use npxmi rather than pxmi, since the former has better metrics. Moreover it allows to set a scaling factor: \documentclass{article} \usepackage[T1]{fontenc} \usepackage[lining]{libertine} \usepackage[libertine, cmintegrals]{newtxmath} \makeatletter \def\npxmath@scaled{.94767} \makeatother \DeclareSymbolFont{greeksymbols}{OML}{npxmi}{m}{it} ...

14

The command $\mu$ is a short version of \begin{equation*} \mu \end{equation*} which is normally used for longer formulas. If you want to typeset (short) formulas like μ, you should use the inline-math mode, i.e. This is an example text containing the greek letter $\mu$.

2

Making your example into an MWE: \documentclass{article} \usepackage{mathpazo} \DeclareSymbolFont{greeksymbols}{OML}{ptm}{m}{it} \DeclareMathSymbol{\pi}{\mathalpha}{greeksymbols}{"25} \DeclareMathSymbol{\chi}{\mathalpha}{greeksymbols}{"31} \DeclareMathSymbol{\mu}{\mathalpha}{greeksymbols}{"22} \begin{document} $\alpha \pi \chi \mu \theta$ ...

5

The error Missing $inserted Missing } inserted Extra }, or forgotten \endgroup is due to the fact that \alpha needs to be in mathmode; hence, within$<math content>$. Therefore, using \item$\alpha\$ value should fix the issue. The following is just a suggestion to look into. It is not fully optimized. \documentclass[letterpaper]{article} ...

0

As it may be of benefit to others, I will mention the solution I currently use: In a document with a lot of greek vectors, I switch the document font from Computer Modern to Charter and use the isomath package, such that \mathbf works as expected on greek characters: \documentclass{article} \usepackage[charter,cal=cmcal]{mathdesign} ...

6

A modification of my answer to Automatically check if a math character is greek or latin should do: \documentclass{article} \usepackage{xparse} \usepackage{bm,upgreek} \ExplSyntaxOn \NewDocumentCommand\Vector{m} { \commexo_vector:n { #1 } } \cs_new_protected:Npn \commexo_vector:n #1 { \tl_map_inline:nn { #1 } { \commexo_vector_inner:n { ##1 ...

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