\ntrianglerightThe symbol \ntriangleright is used to denote a negated relation where an element is not related to another by the 'triangleright' relation. In mathematical contexts, 'triangleright' often represents a specific type of order or relation, such as a subgroup relation in group theory or a preference relation in decision theory. The negation indicates that this relation does not hold between the elements in question.
Element A is not related to element B by the 'triangleright' relation.
A \ntriangleright Bx does not have the 'triangleright' relation to y, indicating a lack of order or preference.
x \ntriangleright yGroup G is not a subgroup of group H under the 'triangleright' relation.
G \ntriangleright H