%0 Journal Article %A ANDREAS DEUCHERT %A SIMON MAYER %A ROBERT SEIRINGER %T THE FREE ENERGY OF THE TWO-DIMENSIONAL DILUTE BOSE GAS. I. LOWER BOUND %J Forum of Mathematics, Sigma %D 2020 %V 8 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1017/fms.2020.17/ %R 10.1017/fms.2020.17 %G en %F 10_1017_fms_2020_17