blackboard;fontsmtpropackage-options
I am using mtpro2 package and it has 7 (!) different options for the Blackboard Bold (BB) to choose from. However only 2 of them provide BB version of Greek letters. And in both cases the result is italic which hurts the eyes when it comes to \mathbb{N, Z, Q, R} and \mathbb{C}.
I was wondering is there a way to have two sets on the same document, maybe with a new command for the Greek letters?
You might want to file a feature request to the developer of newtxmath; in the meantime you can change the definitions of the Greek lowercase letters.
\documentclass{report}
\usepackage[T1]{fontenc}
\usepackage[type1]{libertine}
\usepackage[libertine]{newtxmath}
\usepackage{bm}
\makeatletter
\re@DeclareMathSymbol{\alpha}{\mathord}{lettersA}{11}
\re@DeclareMathSymbol{\beta}{\mathord}{lettersA}{12}
\re@DeclareMathSymbol{\gamma}{\mathord}{lettersA}{13}
\re@DeclareMathSymbol{\delta}{\mathord}{lettersA}{14}
\re@DeclareMathSymbol{\epsilon}{\mathord}{lettersA}{15}
\re@DeclareMathSymbol{\zeta}{\mathord}{lettersA}{16}
\re@DeclareMathSymbol{\eta}{\mathord}{lettersA}{17}
\re@DeclareMathSymbol{\theta}{\mathord}{lettersA}{18}
\re@DeclareMathSymbol{\iota}{\mathord}{lettersA}{19}
\re@DeclareMathSymbol{\kappa}{\mathord}{lettersA}{20}
\re@DeclareMathSymbol{\lambda}{\mathord}{lettersA}{21}
\re@DeclareMathSymbol{\mu}{\mathord}{lettersA}{22}
\re@DeclareMathSymbol{\nu}{\mathord}{lettersA}{23}
\iftx@altnu
\re@DeclareMathSymbol{\nu}{\mathord}{lettersA}{40}
\fi
\re@DeclareMathSymbol{\xi}{\mathord}{lettersA}{24}
\re@DeclareMathSymbol{\pi}{\mathord}{lettersA}{25}
\re@DeclareMathSymbol{\rho}{\mathord}{lettersA}{26}
\re@DeclareMathSymbol{\sigma}{\mathord}{lettersA}{27}
\re@DeclareMathSymbol{\tau}{\mathord}{lettersA}{28}
\re@DeclareMathSymbol{\upsilon}{\mathord}{lettersA}{29}
\re@DeclareMathSymbol{\phi}{\mathord}{lettersA}{30}
\re@DeclareMathSymbol{\chi}{\mathord}{lettersA}{31}
\re@DeclareMathSymbol{\psi}{\mathord}{lettersA}{32}
\re@DeclareMathSymbol{\omega}{\mathord}{lettersA}{33}
\re@DeclareMathSymbol{\varepsilon}{\mathord}{lettersA}{34}
\re@DeclareMathSymbol{\vartheta}{\mathord}{lettersA}{35}
\re@DeclareMathSymbol{\varpi}{\mathord}{lettersA}{36}
\re@DeclareMathSymbol{\varrho}{\mathord}{lettersA}{37}
\re@DeclareMathSymbol{\varsigma}{\mathord}{lettersA}{38}
\re@DeclareMathSymbol{\varphi}{\mathord}{lettersA}{39}
\makeatother
\begin{document}
What I get: $\theta \bm{\theta}$
What I want: $\uptheta \bm{\uptheta}$
\end{document}
Note that \mathbf{\theta} won't do any good, only Latin letters are affected by \mathbf.
You can also define \mathup and \mathbfup:
\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[type1]{libertine}
\usepackage[libertine]{newtxmath}
\usepackage{bm}
\DeclareRobustCommand{\mathup}[1]{\begingroup\changegreek\mathrm{#1}\endgroup}
\DeclareRobustCommand{\mathbfup}[1]{\begingroup\changegreekbf\mathbf{#1}\endgroup}
\makeatletter
\def\changegreek{\@for\next:={%
alpha,beta,gamma,delta,epsilon,zeta,eta,theta,kappa,lambda,mu,nu,xi,pi,rho,sigma,%
tau,upsilon,phi,chi,psi,omega,varepsilon,vartheta,varpi,varrho,varsigma,varphi}%
\do{\expandafter\let\csname\next\expandafter\endcsname\csname\next up\endcsname}}
\def\changegreekbf{\@for\next:={%
alpha,beta,gamma,delta,epsilon,zeta,eta,theta,kappa,lambda,mu,nu,xi,pi,rho,sigma,%
tau,upsilon,phi,chi,psi,omega,varepsilon,vartheta,varpi,varrho,varsigma,varphi}%
\do{\expandafter\def\csname\next\expandafter\endcsname\expandafter{%
\expandafter\bm\expandafter{\csname\next up\endcsname}}}}
\makeatother
\begin{document}
$\mathup{d}\mathup{\theta}d\theta$
$\mathbfup{d}\mathbfup{\theta}\bm{d}\bm{\theta}$
\end{document}
Best Answer
Try
\let\mathbblatin\mathbbafter\usepackage{amssymb}, but before\usepackage{mtpro2}.Then
\mathbblatin{N}in your document. This should give you the AMS blackboard boldN.