Numerical investigation of iso-spectral cavities built from triangles
  We present computational approaches as alternatives to the recent microwave cavity experiment by S. Sridhar and A. Kudrolli (Phys. Rev. Lett. {\bf 72}, 2175 (1994)) on iso-spectral cavities built from triangles. A straightforward proof of iso-spectrality is given based on the mode matching method. Our results show that the experiment is accurate to 0.3% for the first 25 states. The level statistics resemble those of GOE when the integrable part of the spectrum is removed. 
Hua Wu and D. W. L. Sprung (Department of Physics and Astronomy,   McMaster University Hamilton, Ontario, Canada), J. Martor...