A binary operator representing "minus-plus" that alternates signs in expressions, commonly used in mathematical formulas.
Examples
Expression with both plus and minus cases
x = 2 \mp 1 \text{ gives } x = 1 \text{ or } x = 3
Complex number representation
z = r(\cos \theta \mp i\sin \theta)
General solution to quadratic equation
x = -b \mp \sqrt{b^2 - 4ac} \over 2a