Errors in Low and Lapsley's article "Optimization Flow Control, I: Basic   Algorithm and Convergence"
  In the note two errors in Low and Lapsley's article "Optimization Flow Control, I: Basic Algorithm and Convergence", "IEEE/ACM Transactions on Networking", 7(6), pp. 861-874, 1999, are shown. Because of these errors the proofs of both theorems presented in the article are incomplete and some assessments are wrong. 
Andrzej Karbowski