Below is the ascii version of the abstract for 14-36. The html version should be ready soon.

Pavel Exner and Andrii Khrabustovskyi
On the spectrum of narrow Neumann waveguide with periodically distributed $\delta'$ traps
(233K, pdf)

ABSTRACT.  We analyze a family of singular Schr\"odinger operators describing a Neumann waveguide with a periodic array of singular traps of a $\delta'$ type. We show that in the limit when perpendicular size of the guide tends to zero and the $\delta'$ interactions are appropriately scaled, the first spectral gap is determined exclusively by geometric properties of the traps.