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
What Is Rhinitis? It is an inflammation of the nose, resulting in the generation of large amounts of mucus. Its common symptoms are stuffy nose, runny nose, and sneezing. The discharge from the nose can come through the front of the nose. It can also drain through the back of the nose, a condition called post-nasal drip. The most common kind is allergic rhinitis, which is usually triggered by airborne allergens.