@article{BraunFioriniPokuttaetal.2015, author = {G{\´a}bor Braun and Samuel Fiorini and Sebastian Pokutta and D. Steurer}, title = {Approximation Limits of Linear Programs (Beyond Hierarchies)}, journal = {Mathematics of Operations Research}, volume = {40}, number = {3}, pages = {179 -- 199}, year = {2015}, }