Mantissa

The decimal part of a logarithm of a number is called mantissa.

Point

It is a dot mark without any dimensions, and has coordinates if considered in a coordinate system.

Line

Which has length but no breadth and height.

Characteristic

The integral part of a logarithm of a number is called characteristic.

Proper Set

It is the power set of the set except the set itself. [2^n - 1]

Power Set

It is the set which contains the subset of the set as elements. [2^n]

Superset

If A is a subset of B, then B is called the super set of A.