Task: Text Categorization
Input (English): This mathematician names a surface in spacetime which intersects every non-spacelike curve in that spacetime exactly once, and a value named for him appears in the KramersKronig relations. A weaker form of Sylow's first theorem is his theorem which states that if a prime number p divides the order of G, then G has a subgroup of order p. He names a theorem stating that the integral of a function on a simply connected region is equal to the sum of the function's a sub negative one Laurent coefficients at each pole in the region. Any complex differentiable function will satisfy the pair of differential equations named for him and Riemann, and he is the first namesake of an inequality on vector spaces. For 10 points, name this French mathematician whose namesake sequence converges in a complete space.
Output (English): Science