👉 In mathematics, a twisty is a type of curve that has a bend or twist in its shape. These curves are often used to represent objects with a curved surface, such as tori and helices. They can also be used to model various geometric shapes and structures, including spheres, cylinders, cones, and more. A twisty is defined by the equation: \[ \frac{dx}{dt} = f(x) \] where \( x(t) \) represents the position of