cvx.lip.reg             Convex Least Squares Regression with Lipschitz
                        Constraint
cvx.lse.reg             Convex Least Squares Regression.
cvx.pen.reg             Penalized Smooth Convex Regression.
fastmerge               Pre-binning of Data Points.
sim.est                 Single Index Model Estimation: Objective
                        Function Approach.
smooth.pen.reg          Penalized Smooth/Smoothing Spline Regression.
solve.pentadiag         Pentadiagonal Linear Solver.
