# Generalized LLS Problems

This topic describes LAPACK driver routines used for solving generalized linear least squares problems. Table “Driver Routines for Solving Generalized LLS Problems” lists all such routines for Fortran 77 interface. Respective routine names in Fortran 95 interface are without the first symbol (see Routine Naming Conventions).

Driver Routines for Solving Generalized LLS Problems
Routine Name | Operation performed
--- | ---
?gglse | Solves the linear equality-constrained least squares problem using a generalized RQ factorization.
?ggglm | Solves a general Gauss-Markov linear model problem using a generalized QR factorization.