@conference{EURECOM+3909, author = {Cardone, Martina and Tuninetti, Daniela and Knopp, Raymond and Salim, Umer}, title = {The symmetric sum-capacity of the Gaussian Half-Duplex Causal Cognitive Interference Channel to within a constant gap}, booktitle = {ISIT 2013, IEEE International Symposium on Information Theory, 7-12 July 2013, Istanbul, Turkey}, year = {2013}, editor = {IEEE}, address = {Istanbul}, note = {© 2013 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.}, }