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Under the recommendation of the Seventh Central Pay Commission, the CCA classification was abolished in 2008. The earlier HRA classification of cities was changed from A-1 to X; A, B-1, and B-2 to Y; and C and unclassified cities to Z. [2] [3] [4] X, Y, and Z are more commonly known as Tier-1, Tier-2, and Tier-3 cities, respectively.
The Zentralblatt MATH page on the Mathematics Subject Classification. MSC2020 can be seen here. Mathematics Subject Classification 2010 – the site where the MSC2010 revision was carried out publicly in an MSCwiki. A view of the whole scheme and the changes made from MSC2000, as well as PDF files of the MSC and ancillary documents are there.
As per the 2011 Census of India, towns with population of 100,000 and above are called "cities". [1]Visakhapatnam is the most populated city, with a population of 2,278,000 after the merger of surrounding towns into Visakhapatnam Municipal Corporation (VMC) and it being upgraded to Greater Visakhapatnam Municipal Corporation ().
In the decade of 1991–2001, migration to major cities caused rapid increase in urban population. [7] [8] The number of Indians living in urban areas has grown by 31.2% between 1991 and 2001. [9] Yet, in 2001, over 70% lived in rural areas.
Since January 2010 municipalities, departments and cities can combine into a larger body known as a Metropole. The first Metropole in France, Nice-Cote-d'Azur was created in 2011. In 2014 the government of Jean-Marc Ayrault passed a bill that moved away from the voluntary nature and made it mandatory for all Metropolitan areas of over 600,000 ...
Urbanization has a great impact on biodiversity. As cities develop, vital habitats are destroyed or fragmented into patches which leads to them not being big enough to support complex ecological communities. In cities, species can become endangered or locally extinct. The human population is the main contributor to the expansion of urban areas.
The income tax laws have a different classifications. Banks have another classification. The Indian Census, data from which are used in most classifications have its own classification of Cities and UAs The page needs to be objective. K N Unni 18:27, 15 March 2013 (UTC)
The contemporary Mathematics Subject Classification lists more than sixty first-level areas of mathematics. Areas of mathematics Before the Renaissance , mathematics was divided into two main areas: arithmetic , regarding the manipulation of numbers, and geometry , regarding the study of shapes. [ 7 ]