A directional compactification of the complex Fermi surface and isospectrality
Séminaire Équations aux dérivées partielles (Polytechnique) (1989-1990), Talk no. 4, 9 p.
@article{SEDP_1989-1990____A4_0,
     author = {B\"attig, Daniel},
     title = {A directional compactification of the complex Fermi surface and isospectrality},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique)},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1989-1990},
     note = {talk:4},
     zbl = {0716.35082},
     mrnumber = {1073179},
     language = {en},
     url = {http://www.numdam.org/item/SEDP_1989-1990____A4_0}
}
Bättig, D. A directional compactification of the complex Fermi surface and isospectrality. Séminaire Équations aux dérivées partielles (Polytechnique) (1989-1990), Talk no. 4, 9 p. http://www.numdam.org/item/SEDP_1989-1990____A4_0/

[B] D. Bättig, A toroidal compactification of the Fermi-surface for the disrete Laplace operator. Preprint ETH Zürich 1989.

[BKT] D. Bättig, H. Knörrer, E. Trubowitz, A directional compactification of the complex Fermi surface. Preprint ETH Zürich 1989. | Numdam | MR 1117340 | Zbl 0754.58038

[Bo] G. Borg, Eine Umkehrung der Sturm-Liouvilleschen Eigenwertaufgabe. Acta Math. 78, 1-96 (1946). | MR 15185 | Zbl 0063.00523

[KT] H. Knörrer, E. Trubowitz, A directional compactification of the complex Bloch variety. To appear in Comment. Math. Helvetici. | MR 1036133 | Zbl 0723.32006