Harry B. Hunt III, Richard Edwin Stearns. Nonlinear Algebra and Optimization on Rings are Hard . SIAM Journal on Computing, 16(5):910-929, 1987.
@article{HuntS87, title = {Nonlinear Algebra and Optimization on Rings are Hard }, author = {Harry B. Hunt III and Richard Edwin Stearns}, year = {1987}, tags = {optimization, algebra}, researchr = {https://researchr.org/publication/HuntS87}, cites = {0}, citedby = {0}, journal = {SIAM Journal on Computing}, volume = {16}, number = {5}, pages = {910-929}, }