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rough Numbers Cheat Sheet (DRAFT) by

Natural Numbers (N) : - Starts from 0 and positive number - Natural numbers are discrete, they don't have a number in between

This is a draft cheat sheet. It is a work in progress and is not finished yet.

NUMBERS

Natural Numbers (N)
#00000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#000000
#00000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000000

NUMBERS (copy)

Natural Numbers (N)
#00000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#000000
#00000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000­000­#00­000­0#0­000­00#­000000

SET THEORY

Types of Sets in Maths
Empty Set ϕ: The set is empty! This means that there are no elements in the set. This set is repres­ented by ϕ or {}.
it is known as an empty set or null set or void set. For e.g. consider the set, P = {x : x is a leap year between 1904 and 1908}
Between 1904 and 1908, there is no leap year. So, P = ϕ.