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In mathematics according to the nature shown by a Function it can be classified into different types. Like one-to-one function and onto function. Continue reading to find more.

A Function from set A to set B is a Relation or a rule which associates or maps or images  each and every element of set A with a  element  in set B.
A function is a special case or Relation in which each and every element of first set (A) is related with only one element of second set(B)
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An entity which have a single and defined value is known as “Constant” and an entity which have more than one values is known and “Variable”.
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Any subset of a Cartesian product A×B in which the first element and second element of ordered pairs have special relation to each other is known as “Relation”. Continue reading to find out more.

The Cartesian Product of two sets A and B is the set of all Ordered Pairs (a,b)  where the first element of order pairs “a” belongs to first set “A” and second element of ordered pairs “b” belongs or second set “B”. Continue reading to find more.

A pair or set which have only two elements in which order of its elements are predefined is known as an ordered pair. read more to know about pair , ordered pair , denotation of ordered pair ,equal ordered pairs.

Number is one of the basic concept of mathematics. A Number basically representation of quantity of any object. Number system started from the time of ancient civilization , Primitive man used to compare one quantity with another when there was no number ; Like they used to lay aside each pebble for a sheep they rear , in order to count sheep.  latter with advancement in language they gave the number a name and a symbol like for first quantity the name is “One”  and symbol is “1″ and for fifth quantity the name is “Five” and symbol is “5″.
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