graph(Noun) An ordered pair , where is a set of elements called vertices (or nodes) and is a set of pairs of elements of , called edges; informally, a set of vertices together with a set edges that join these vertices.
Clubbing is an enlargement of the ends of the fingers and a downward sloping of the nails. Although it's not caused by chronic obstructive pulmonary disease (COPD), it can be a sign of coexisting lung cancer or other lung disorders in patients with COPD. Clubbing is sometimes called digital clubbing. It can affect the fingers and/or toes.
1 Ill-fitting shoes can cause ingrown toenail. 2  Cutting nails incorrectly, as mentioned earlier, is the most common cause of ingrown nail. 3  Injury to your nail or the skin around it may also lead to an ingrown nail.  Sometimes heredity too plays a role in giving you ingrown nails.