 Willem Jacob van Stockum

Willem Jacob van Stockum was a Dutch mathematician and physicist known for his work in theoretical physics, particularly in the area of general relativity and cosmology. One of his notable contributions is the formulation of solutions to the Einstein field equations, which describe the gravitational effects of mass and energy on the curvature of spacetime. He is primarily remembered for his work on "van Stockum's cylinder," which refers to a specific solution of the Einstein equations that describes a rotating cylindrical mass.