@article{oai:repository.dl.itc.u-tokyo.ac.jp:00049249, author = {Kashima, Yohei}, issue = {1}, journal = {Journal of Mathematical Sciences, The University of Tokyo}, month = {Feb}, pages = {1--158}, title = {The zero-temperature limit of the free energy density in many-electron systems at half-filling}, volume = {24}, year = {2017} }