A set is countable if: (1) it is finite, or (2) it has the same cardinality (size) as the set of natural numbers. Equivalently, a set is countable if it has the same cardinality as some subset of the set of natural numbers.Otherwise, it is uncountable.heorem: The set of all finite subsets of the natural numbers is countable. If you have a finite subset, you can order the elements into a finite sequence. There are only countably many finite sequences, so also there are only countably many finite subsets.
Rhinitis: Introduction. Rhinitis: Nasal lining inflammation leading to runny/blocked nose. More detailed information about the symptoms, causes, and treatments of Rhinitis is available below. Symptoms of Rhinitis
Rhinitis is a term implying inflammation of the nasal mucosa. There is generalised swelling of the mucosa, increased volume and viscosity of nasal secretions and impairment of normal ciliary function. Clinically, rhinitis is defined by the onset of two or more of the following symptoms - nasal discharge, sneezing, nasal itching and congestion.