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.
The causes of spoon nails vary. The condition can be hereditary. When this is the case, multiple nails will be affected with some sort of a concave dip. The indent will grow out, but the new nail will have the same indents. Sometimes spoon nails are due to a client continually picking, biting, or rubbing her nails.