Combinatorica`
Combinatorica`
UndirectedQ
As of Version 10, most of the functionality of the Combinatorica package is built into the Wolfram System. »
UndirectedQ[g]
yields True if graph 
is undirected.
Details and Options
- UndirectedQ functionality is now available in the built-in Wolfram Language function UndirectedGraphQ.
- To use UndirectedQ, you first need to load the Combinatorica Package using Needs["Combinatorica`"].
Examples
Basic Examples (2)
UndirectedQ has been superseded by UndirectedGraphQ:
Wolfram Research (2012), UndirectedQ, Wolfram Language function, https://reference.wolfram.com/language/Combinatorica/ref/UndirectedQ.html.
Text
Wolfram Research (2012), UndirectedQ, Wolfram Language function, https://reference.wolfram.com/language/Combinatorica/ref/UndirectedQ.html.
CMS
Wolfram Language. 2012. "UndirectedQ." Wolfram Language & System Documentation Center. Wolfram Research. https://reference.wolfram.com/language/Combinatorica/ref/UndirectedQ.html.
APA
Wolfram Language. (2012). UndirectedQ. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/Combinatorica/ref/UndirectedQ.html