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.
They may be a sign of: a previous illness â the line forms at the time of the illness chemotherapy a previous injury previous exposure to extremely cold temperatures, if you have Raynaud's disease Illness, injury or cold temperatures can interrupt nail growth and cause nail grooves to form at the base of the nails.