The core courses are:

Scientific Computing 6910. Matrix Computations and Applications or Computer Science 6732 Matrix Computations (credit may be obtained for only one of CMSC 6910 and COMP 6732)
Scientific Computing 6920. Applied Scientific Programming
Scientific Computing 6930. Algorithms for Distributed and Shared Memory Computers
Scientific Computing 6950. Computer Based Research Tools and Applications
Computer Science 6906. Topics in Numerical Methods
Mathematics 6210. Numerical Solutions of Differential Equations