The Differentiation of Pseudo-Inverses and Nonlinear Least Squares Problems Whose Variables Separate
For given data $(t_i ,y_i ),i = 1, \cdots ,m$, we consider the least squares fit of nonlinear models of the form \[ \eta ({\bf a},{\boldsymbol \alpha} ;t) = \sum _{j = 1}^n {a_j...