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.
What Causes Ingrown Nails? Ingrown nails are most frequently caused by cutting your toenails too short or rounding the nail edges or by wearing ill-fitting shoes or tight hosiery that press the nail into your toe. You can also develop an ingrown nail after an injury, such as stubbing or jamming your toe.