2

I want to write \gamma with bold, for this I use \mathbf{\gamma} but the result that I have is not with bold. How can I fix this problem. someone can help me?

Thank you in advance.

\documentclass[a4paper,11pt]{report}
\usepackage[latin1]{inputenc} 
\usepackage[T1]{fontenc} 
\usepackage[francais]{babel} 
\usepackage[left=3cm,right=2.5cm,top=2.5cm,bottom=3cm]{geometry} 
\usepackage{color} 
\usepackage{amsmath} 
\usepackage{lmodern} 
\usepackage{amsthm} 
\usepackage[mathcal]{eucal} 
\usepackage{amssymb} 
\usepackage{mathrsfs} 
\usepackage{graphicx}
\usepackage{setspace} 
\usepackage{fancyhdr} 
\usepackage{natbib} 
\setstretch{1,4} 
\begin{document}

Définissons également le vecteur colonne

 $$\mathbf{\gamma}_c(t)=(\gamma_c^{(u,l,0,0)}(t),\gamma_c^{(u,l,1,0)}(t),...,\gamma_c^{(u,l,1,d)}(t),...,\gamma_c^{(u,l,k,0)}(t),...,\gamma_c^{(u,l,k,d)}(t))^{'}_{1*((d+1)k+1)}$$ 

\end{document}
user190633
  • 325
salime
  • 21

2 Answers2

6

enter image description here

\documentclass{article}

\usepackage{bm}

\begin{document}

\[
\gamma
\bm{\gamma}
\]

\end{document}
David Carlisle
  • 757,742
2

With \boldsymbol

\documentclass[a4paper,11pt]{report}
\usepackage[latin1]{inputenc} 
\usepackage[T1]{fontenc} 
\usepackage[francais]{babel} 
\usepackage[left=3cm,right=2.5cm,top=2.5cm,bottom=3cm]{geometry} 
\usepackage{color} 
\usepackage{amsmath} 
\usepackage{lmodern} 
\usepackage{amsthm} 
\usepackage[mathcal]{eucal} 
\usepackage{amssymb} 
\usepackage{mathrsfs} 
\usepackage{graphicx}
\usepackage{setspace} 
\usepackage{fancyhdr} 
\usepackage{natbib} 
\setstretch{1,4} 
\begin{document}

Définissons également le vecteur colonne

\[
\boldsymbol{\gamma}_c(t)=(\gamma_c^{(u,l,0,0)}(t),\gamma_c^{(u,l,1,0)}(t),...,\gamma_c^{(u,l,1,d)}(t),...,\gamma_c^{(u,l,k,0)}(t),...,\gamma_c^{(u,l,k,d)}(t))^{'}_{1*((d+1)k+1)}
\]

\end{document}

enter image description here

user190633
  • 325
  • 3
    as a general rule \bm will give a better result than \boldsymbol (akthough the same in this case) – David Carlisle Jun 12 '19 at 21:34
  • I agree totally with David: see this link https://tex.stackexchange.com/questions/3238/bm-package-versus-boldsymbol – Sebastiano Jun 12 '19 at 21:38
  • why it works correctly with big gamma \ Gamma but no result with small gamma \gamma ? – salime Jun 12 '19 at 21:41
  • @salime Can you please show the code that causes the problem with the small \gamma? – user190633 Jun 12 '19 at 21:43
  • 2
    @salime you have two answers now that show complete documents (and bold gammas) if you are not getting bold, edit your question to make a similar complete example document that shows the problem – David Carlisle Jun 12 '19 at 21:43
  • this is the code $$\mathbf{\gamma}c(t)=(\gamma_c^{(u,l,0,0)}(t),\gamma_c^{(u,l,1,0)}(t),...,\gamma_c^{(u,l,1,d)}(t),...,\gamma_c^{(u,l,k,0)}(t),...,\gamma_c^{(u,l,k,d)}(t))^{'}{1*((d+1)k+1)}$$ – salime Jun 12 '19 at 21:48
  • @salime not the problem, but don't use $$ for equations – user190633 Jun 12 '19 at 21:49
  • @salime replacing \mathbf with \boldsymbol gives a bold \gamma for me. Maybe you have some problematic package. Can you make a small document that reproduces your problem? – user190633 Jun 12 '19 at 21:50
  • 1
    @salime that is not a complete document and it is not added as an edit to your question, You need to provide something that people can run and debug why you are not getting a bold font, it will be unrelated to the expression you have shown in that comment but related to your font setup in the preamble. mathptmx for example has no bold math fonts, if you are using that. – David Carlisle Jun 12 '19 at 21:52
  • this is a part of my document latex \documentclass[a4paper,11pt]{report} \usepackage[latin1]{inputenc} \usepackage[T1]{fontenc} \usepackage[francais]{babel} \usepackage[left=3cm,right=2.5cm,top=2.5cm,bottom=3cm]{geometry} \usepackage{color} \usepackage{amsmath} \usepackage{lmodern} \usepackage{amsthm} \usepackage[mathcal]{eucal} \usepackage{amssymb} \usepackage{mathrsfs} \usepackage{graphicx} \usepackage{setspace} \usepackage{fancyhdr} \usepackage{natbib} \setstretch{1,4}

    \begin{document}

     – salime Jun 12 '19 at 21:58
  • Définissons également le vecteur colonne $$\mathbf{\gamma}c(t)=(\gamma_c^{(u,l,0,0)}(t),\gamma_c^{(u,l,1,0)}(t),...,\gamma_c^{(u,l,1,d)}(t),...,\gamma_c^{(u,l,k,0)}(t),...,\gamma_c^{(u,l,k,d)}(t))^{'}{1*((d+1)k+1)}$$

    \end{document}

     – salime Jun 12 '19 at 21:59
  • @salime Works fine with \boldsymbol and replacing $$...$$ with \[...\] – user190633 Jun 12 '19 at 22:04
  • i think that i have a problem of my package – salime Jun 12 '19 at 22:07
  • @salime It would be helpful if you could tell us which package. The packages you showed work good enough (there are a few warnings which you should fix) – user190633 Jun 12 '19 at 22:08
  • 1
    @salime do not post code in comments (it does not make a readable result) edit your question and add a complete document that shows the problem – David Carlisle Jun 12 '19 at 22:09
  • Thank you for your efforts – salime Jun 12 '19 at 22:15
  • Thanks everyone, the problem is solved after downloading the \bm package from CTAN. I think that the problem was my old package that does not work properly. – salime Jun 13 '19 at 14:13