Is the Sigma Nu fraternity at university of Arkansas on probation in 2013?

I don't have access to real-time information, including the specific disciplinary status of fraternities at universities. To find out if Sigma Nu at the University of Arkansas was on probation in 2013, you would need to contact:

* The University of Arkansas's Office of Fraternity and Sorority Life: They would have records of any disciplinary actions taken against fraternities on campus.

* The Sigma Nu national headquarters: They might have access to records of chapter disciplinary actions, though they may not release this information publicly.

* The University of Arkansas archives or student newspaper archives: These might contain news articles or other documents mentioning the fraternity's status.

Searching online for news articles from 2013 related to the University of Arkansas and Sigma Nu might also yield some results, but this method is not guaranteed to be successful.