2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/29244We reexamine the Yang-Yang-Takahashi method of deriving the thermodynamic Bethe ansatz equations which describe strongly correlated electron systems of fundamental physical interest, such as the Hubbard, $s-d$ exchange (Kondo) and Anderson models. It is shown that these equations contain some additional terms which may play an important role in the physics of the systems.4 pages, RevTexStrongly Correlated Electronstext