Trying to stop change from Title Case to Sentence case in bibtex entries

[reader3]

For some reason, when TexStudio runs, it is changing the Title Case in a bibtex entry to sentence case. What setting can block this from occurring?

Here is the tex code:

\documentclass{article}
\usepackage{amsmath, amssymb, amsthm}
\usepackage{geometry}
\begin{document}
\section{Checking for Title Case to Sentence Case Change?}
This is a test of the bibtex file "test.bib" to see if it is being changed from Title Case to Sentence Case.\hfill\\
See\cite{An_author}.\hfill\\
\noindent
The actual bibtex file "test.bib" reads:\hfill
\begin{verbatim}
@article{An_author,
archiveprefix = {arXiv},
author = {Author, An},
eprint = {1705.05929},
journal = {arXiv preprint arXiv:1705.05929},
pages = {},
primaryclass = {math.NT},
title = {The Integer Cuboid Table},
url = {https://arxiv.org/abs/1705.05929},
year = {2017}
}
\end{verbatim}
Why is the title case being changed to sentence case? What setting in TexStudio needs to be changed to prevent this from happening?
\section{TexStudio Version}
\begin{verbatim}
TeXstudio 4.9.2 (git 4.9.1-9-g06d8d26fd)
Using Qt Version 5.15.8, compiled with Qt 5.15.8 R

Project home site: https://texstudio.org/
Latest stable version: 4.9.1
\end{verbatim}
\bibliographystyle{amsplain}
\bibliography{test}
\end{document}

and the bibtex file "test.bib" is

@article{An_author,
archiveprefix = {arXiv},
author = {Author, An},
eprint = {1705.05929},
journal = {arXiv preprint arXiv:1705.05929},
pages = {},
primaryclass = {math.NT},
title = {The Integer Cuboid Table},
url = {https://arxiv.org/abs/1705.05929},
year = {2017}
}

When you run this, you can see the Title case being changed to Sentence case.

Any ideas why? Is perhaps the line bibliographystyle{amsplain} doing this?

• Randall

[sunderme]

I don't understand what you are doing exactly and where something is changed ?

[reader3]

The title of a reference was changed to sentence case. As another stated, the tex bst file /usr/share/texmf/bibtex/bst/amscls/amsplain.bst in the FUNCTION format.title{} is the reason for this. I followed a simple fix list on the Tex Stack Exchange.

[muzimuzhi]

The case change is done by the bib style amsplain.bst, more specifically the FUNCTION {format.title}. Adding an extra pair of braces does the trick, but may violate what the bib style requires.

See https://tex.stackexchange.com/q/10772 for more info.

\begin{filecontents}[noheader, force]{test.bib}
@article{An_author,
	archiveprefix = {arXiv},
	author = {Author, An},
	eprint = {1705.05929},
	journal = {arXiv preprint arXiv:1705.05929},
	pages = {},
	primaryclass = {math.NT},
	title = {{The Integer Cuboid Table}},
	url = {https://arxiv.org/abs/1705.05929},
	year = {2017}
}
\end{filecontents}
\documentclass{article}
\usepackage{amsmath, amssymb, amsthm}
\usepackage{geometry}

\begin{document}
See~\cite{An_author}.

\bibliographystyle{amsplain}
\bibliography{test}
\end{document}

With

title = {{The Integer Cuboid Table}}

in PDF you then get (may need a manual bibtex run, via Tools - Commands - Bibtex)

[reader3]

Thanks for confirming my hunch. I fixed the bst file FUNCTION format.title{} to my liking. Appreciate you mentioning this.

[muzimuzhi]

Better to leave the /usr/share/texmf/bibtex/bst/amscls/amsplain.bst installed by TeX Live as-is, and make a copy of amsplain.bst in your working directory, then only modify that local one.