Sonja Currie, Bruce A. Watson
Abstract: Submitted March 9, 2005. Published August 24, 2005.
Math Subject Classifications: 47E05, 34L20, 34B45.
Key Words: Differential operators; spectrum; graphs.
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Sonja Currie School of Mathematics University of the Witwatersrand Private Bag 3, P O WITS 2050, South Africa email: scurrie@ananzi.co.za |
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Bruce A. Watson School of Mathematics University of the Witwatersrand Private Bag 3, P O WITS 2050, South Africa bwatson@maths.wits.ac.za |
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