\npreceq
The symbol \npreceq is used in mathematics to denote that one element is not precede or equal to another in a partial order. It is the negation of the \preceq relation, which means 'precedes or is equal to'.
Element 'a' does not precede or equal element 'b' in a partial order.
a \npreceq b
Element 'x' is not less than or equal to element 'y' in a poset.
x \npreceq y
In a set with a defined order, 'p' does not precede or equal 'q'.
p \npreceq q