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.
Weak and brittle nails that can easily become cracked or chipped are a common problem affecting both men and women. There are three main factors that cause brittle nails â aging, long-term use of nail polish and frequent exposure to water. Brittle nails can also be associated with some diseases, such as hyperthyroidism, hypothyroidism, lung conditions, psoriasis, lichen planus, alopecia areata, eczema, anemia, fungal infection, and endocrine disorders.