Talk:Approximation algorithm

There was an error on this page, specifically that the "dominance number" is made to sound as if it is a "replacement" for some other measure, whereas the reference I found calls it an orthoganal measure. There should probably still be a section about other measurements of approx. algorithms. The paper [1] I found that confirmed this error had some interesting contetnt that perhaps someone should write up. --NotQuiteEXPComplete 16:50, 22 August 2006 (UTC)[reply]

An obvious problem: R_a is used to define R_a; whassup? Gritzko 06:30, 11 June 2007 (UTC)[reply]

One is a function, the other is a set. You are right though, it'd probably be less confusing to use another variable.--NotQuiteEXPComplete 09:26, 20 June 2007 (UTC)[reply]

References for Approximation Guarantees

Seeing how there are many different and varying definitions used for approximation guarantees, I would preferably like to see inline sources. The article currently uses ρ-approximation algorithms (relative performance guarantee) and I strongly believe that the definition is taken from Handbook of Approximation Algorithms and Metaheuristics but I cannot verify this myself. The definition used also agrees with "factor δ approximation algorithms" from Vazirani's book but it does not agree with the usual performance ratio which in Cormen et.al. uses the symbol ρ. —Preceding unsigned comment added by C. lorenz (talk • contribs) 18:23, 24 April 2009 (UTC)[reply]