Uri Andrews, Rutger Kuyper, Steffen Lempp, Mariya I. Soskova, Mars M. Yamaleev. Nondensity of Double Bubbles in the D.C.E. Degrees. In Adam R. Day, Michael R. Fellows, Noam Greenberg, Bakhadyr Khoussainov, Alexander G. Melnikov, Frances A. Rosamond, editors, Computability and Complexity - Essays Dedicated to Rodney G. Downey on the Occasion of His 60th Birthday. Volume 10010 of Lecture Notes in Computer Science, pages 547-562, Springer, 2017. [doi]
Abstract is missing.