What is the difference between
and
Thank you very much
A,B sets
A B ---> this means that all elements from set A are also elements of set B where B is bigger set ( it has more elements (important) )
A B ---> this means that all elements from set A are also elements of set B where A can be equal to B
example: A = { 1, 2, 3 }
B = { 1, 2, 3 }
then this is true: A B , but this isnt A B
but if B is = { 1, 2, 3, 4 }
A B is true and this is also true A B
You may not be pleased with this answer.
There is no precise difference; it generally depends upon the author and the textbook.
In general, stands for a proper subset and in that case this symbol is also used.
That is, it is a subset but not the entire superset.
For example, all of the following are correct usage:
To be clear as to a set being a proper subset it is best to use this .
That makes it clear that is not .