@article{v012a006, author = {Guruswami, Venkatesan and Lee, Euiwoong}, title = {Simple Proof of Hardness of Feedback Vertex Set}, year = {2016}, pages = {1--11}, doi = {10.4086/toc.2016.v012a006}, publisher = {Theory of Computing}, journal = {Theory of Computing}, volume = {12}, number = {6}, URL = {https://theoryofcomputing.org/articles/v012a006}, }