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A fundamental question raised by M. Kac in 1966 is: Must two isospectral planar domains necessarily be isometric? Following a long history of investigation C. Gordon, D. L. Webb and S. Wolpert in 1992 finally proved that the answer is no. By using the idea of transposition maps one can construct a wide class of planar domains with piecewise continuous boundaries which are isospectral but non-isometric. In this note we study the Kac question in relation to domains with fractal boundaries and by following a technique of paper folding maps by J. Chapman 1993 we construct pairs of isospectral but non-isometric connected planar domains with fractal boundaries having the same Minkowski dimension.
Sleeman, Brian D., and Hua, Chen. "On nonisometric isospectral connected fractal domains.." Revista Matemática Iberoamericana 16.2 (2000): 351-361. <http://eudml.org/doc/39604>.
@article{Sleeman2000, abstract = {A fundamental question raised by M. Kac in 1966 is: Must two isospectral planar domains necessarily be isometric? Following a long history of investigation C. Gordon, D. L. Webb and S. Wolpert in 1992 finally proved that the answer is no. By using the idea of transposition maps one can construct a wide class of planar domains with piecewise continuous boundaries which are isospectral but non-isometric. In this note we study the Kac question in relation to domains with fractal boundaries and by following a technique of paper folding maps by J. Chapman 1993 we construct pairs of isospectral but non-isometric connected planar domains with fractal boundaries having the same Minkowski dimension.}, author = {Sleeman, Brian D., Hua, Chen}, journal = {Revista Matemática Iberoamericana}, keywords = {Variedad riemanniana; Isometría; Dominios; Fractales; Variedades compactas; Isoespectralidad; fractal boundary; Riemannian manifolds; isospectral; spectrum; Dirichlet Laplacians}, language = {eng}, number = {2}, pages = {351-361}, title = {On nonisometric isospectral connected fractal domains.}, url = {http://eudml.org/doc/39604}, volume = {16}, year = {2000}, }
TY - JOUR AU - Sleeman, Brian D. AU - Hua, Chen TI - On nonisometric isospectral connected fractal domains. JO - Revista Matemática Iberoamericana PY - 2000 VL - 16 IS - 2 SP - 351 EP - 361 AB - A fundamental question raised by M. Kac in 1966 is: Must two isospectral planar domains necessarily be isometric? Following a long history of investigation C. Gordon, D. L. Webb and S. Wolpert in 1992 finally proved that the answer is no. By using the idea of transposition maps one can construct a wide class of planar domains with piecewise continuous boundaries which are isospectral but non-isometric. In this note we study the Kac question in relation to domains with fractal boundaries and by following a technique of paper folding maps by J. Chapman 1993 we construct pairs of isospectral but non-isometric connected planar domains with fractal boundaries having the same Minkowski dimension. LA - eng KW - Variedad riemanniana; Isometría; Dominios; Fractales; Variedades compactas; Isoespectralidad; fractal boundary; Riemannian manifolds; isospectral; spectrum; Dirichlet Laplacians UR - http://eudml.org/doc/39604 ER -