∖ (set minus)
Computes a set difference.
Syntax

A ∖ B

A
andB
are sets

Description
If A
and B
are sets, then A ∖ B
is the set difference of A
and B
.
The ∖
operator is implemented by the SetDifference
function.
Notes
To insert the set difference symbol ∖, type \setminus
. (See Keyboard input.)
Don’t confuse the set minus symbol ∖ (U+2216: SET MINUS) with \ (U+005C: REVERSE SOLIDUS).
Examples
A ≔ { 1, 2, 3, 4, 5 }
{4, 5, 1, 2, 3}
B ≔ { 0, 2, 4, 6, 8, 10 }
{4, 6, 10, 2, 8, 0}
A ∖ B
{1, 5, 3}
B ∖ A
{6, 10, 8, 0}
See also

Set operators (list)