The mathbf does not work in latex

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I tried to use $(mathbf{theta}_{k})$ but it does not work.



I still have unbold theta. While it works for any letter.



Here is my latex:



documentclass{article}

usepackage[utf8]{inputenc}

usepackage{mathtools}

title{Try}

begin{document}

maketitle

$(mathbf{theta}_{k})$

$(mathbf{k})$

end{document}


Any help, please?






math-mode







share|improve this question























  • Possible duplicate of How can I get bold math symbols?

    – José Carlos Santos
    22 secs ago
















0















I tried to use $(mathbf{theta}_{k})$ but it does not work.



I still have unbold theta. While it works for any letter.



Here is my latex:



documentclass{article}

usepackage[utf8]{inputenc}

usepackage{mathtools}

title{Try}

begin{document}

maketitle

$(mathbf{theta}_{k})$

$(mathbf{k})$

end{document}


Any help, please?






math-mode







share|improve this question























  • Possible duplicate of How can I get bold math symbols?

    – José Carlos Santos
    22 secs ago














0












0








0








I tried to use $(mathbf{theta}_{k})$ but it does not work.



I still have unbold theta. While it works for any letter.



Here is my latex:



documentclass{article}

usepackage[utf8]{inputenc}

usepackage{mathtools}

title{Try}

begin{document}

maketitle

$(mathbf{theta}_{k})$

$(mathbf{k})$

end{document}


Any help, please?






math-mode







share|improve this question














I tried to use $(mathbf{theta}_{k})$ but it does not work.



I still have unbold theta. While it works for any letter.



Here is my latex:



documentclass{article}

usepackage[utf8]{inputenc}

usepackage{mathtools}

title{Try}

begin{document}

maketitle

$(mathbf{theta}_{k})$

$(mathbf{k})$

end{document}


Any help, please?






math-mode




math-mode






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 10 mins ago









MaryamMaryam

1457




1457













  • Possible duplicate of How can I get bold math symbols?

    – José Carlos Santos
    22 secs ago



















  • Possible duplicate of How can I get bold math symbols?

    – José Carlos Santos
    22 secs ago

















Possible duplicate of How can I get bold math symbols?

– José Carlos Santos
22 secs ago





Possible duplicate of How can I get bold math symbols?

– José Carlos Santos
22 secs ago










0






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