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 Proximal subungual onychomycosis (PSO) â this subtype is caused when the fungus invades the skin around your nail (cuticle), your nail fold, and then penetrates your nail plate. 2  Endonyx onychomycosis (EO) â this cause is when the fungi reaches your nail from the skin and invades your nail plate.