Graph labeling is a central topic in combinatorial optimisation that involves assigning numerical or categorical labels to vertices or edges of a graph subject to specific constraints. This framework ...

When you see a label that states “Product of USA” or “Made in the USA” on a package of meat at the grocery store, you’d be forgiven for assuming the meat inside came from livestock bred in the U.S.

When I buy any one of hundreds of consumer items, I know from the label where they were manufactured. Why shouldn't I know the country of origin of the beef, pork and lamb I buy in my supermarket? The ...