Again on the Farkas Theorem and the Tucker Key Theorem Proved Easily
Giorgio Giorgi · RePEc: Research Papers in Economics · 2014
The purpose of this paper is twofold; first, to present a simple proof of the Farkas theorem (or Farkas lemma or Farkas-Minkowski lemma), proof performed through a nonlinear theorem of the alternative; second, to present various new proofs of the so-called "Tucker key theorem", and to show that these two results are essentially equivalent.