The symbol I would like to obtain ought to be like the symbol '\pm'.
Symbols – What Is the Symbol for ‘Multiplication on Division’ in LaTeX
symbols
Related Solutions
The graphics package also lets you rotate boxes, as explained in Section 7.2 of Lamport's LaTeX: A document preparation system. You use \rotatebox{x}{text}, where x is a specified angle in the positive (counterclockwise) direction with the "positive x-axis", which extends horizontally from the basepoint of the box that contains text.
I found it in the Journal of Combinatorial Optimization (2007) 13:217-221, February 14, 2007:
A 2-approximation for the preceding-and-crossing structured 2-interval pattern problem. There the expression \{<,\between\} has been used, as can be seen in the abstract.
Regarding intervals, \between 
may stand for a crossing/overlapping relation like < for a precedence order and kind of a subset symbol for inclusion/nesting. See also Extracting constrained 2-interval subsets in 2-interval sets.
In such difficult cases, the LaTeX search engine of Springer is a useful tool (now discontinued).
Best Answer
The symbol you need to use is produced by the following command:
\divideontimes