What Do [] Mean in Algebra

if using this in sets, () stands for open interval and [] means closed interval and {} is used to denote specific elements. Closed interval means the extreme numbers of the set are included in it and open means they arent. For example, (9,10] is the set of all numbers between 9 and 10 excluding 9 and including 10.

What does [] mean in math?

if using this in sets, () stands for open interval and [] means closed interval and {} is used to denote specific elements. Closed interval means the extreme numbers of the set are included in it and open means they arent. For example, (9,10] is the set of all numbers between 9 and 10 excluding 9 and including 10.

What does {} mean in algebra?

This {} symbol is used in Set Theory for grouping of sets say N={1,2,3,4… } represents set of Natural Numbers. It is also use as denoting fractional part of any number x. i.e {x}=x-[x]