Help: CS1 errors

==<span id="bad_arxiv">Check |arxiv= value</span>== 
<section begin="bad_arxiv_help_text" />{{help desk}}{{#invoke:Cs1 documentation support|help_text_error_messages|err_bad_arxiv}}

When {{cs1}} and {{cs2}} templates contain {{para|arxiv}}, a test is done to see if the [[arXiv]] identifier conforms with the arXiv identifier scheme.<ref>{{cite web |url=https://arxiv.org/help/arxiv_identifier |title=Understanding the arXiv identifier |website=[[Cornell University Library]] |access-date=2014-08-20}}</ref> The identifier is checked for a valid number of digits in the article id; valid year and month values; and properly-placed hyphens, slashes, and dots.

To resolve this error, ensure that the {{para|arxiv}} value is correct.

Pages with this error are automatically placed in {{#invoke:cs1 documentation support|help_text_cats|err_bad_arxiv|pages=yes}}.<ref group="lower-alpha" name="categories" /><section end="bad_arxiv_help_text" />