What this symbols means regarding groups

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SUMMARY

The discussion clarifies the meaning of the symbols "a\b" and "b\a" in the context of set theory. Specifically, "a\b" denotes the set of elements in set "a" that are not present in set "b", while "b\a" indicates the elements in set "b" that are not in set "a". It is important to differentiate these set operations from the subtraction operation "a - b", which involves the arithmetic subtraction of elements from one set by elements of another.

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i got two groups of numbers "a" and "b"

what is the meaning of a\b and b\a

??
 
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Do you mean "groups" in the algebraic sense or just sets of numbers. Typically, if a and b are sets "a\b" means all members of a that are NOT in b. It is the same a intersect (complement b).

When you are dealing specifically with sets of numbers you should be careful to distinguish that from "a- b" which means the set of all numbers that can be formed by subtracting a number in b from a number in a.
 

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