Dynamic Equations on Time Scales (Homepage of Martin Bohner) R. P. Agarwal, D. O'Regan, and myself were editing a special issue of the Journal of Computational and Applied Mathematics entitled Dynamic Equations on Time Scales. The special issue has been published on April 1, 2002. The addresses of the editors are: Ravi Agarwal, National University of Singapore, Department of Mathematics, Singapore 119260, Singapore Martin Bohner, University of Missouri-Rolla, Department of Mathematics, 115 Rolla Building, Rolla, MO 65409, USA Donal O'Regan, University College Galway, Department of Mathematics, Galway, Ireland Contributors and titles are as follows: Ravi Agarwal, NUS, Singapore and Martin Bohner, Rolla, MO and Donal O'Regan, Galway, Ireland: Time scale boundary value problems on infinite intervals. Calvin Ahlbrandt and Christina Morian, Columbia, MO: Partial differential equations on time scales. Douglas Anderson, Moorhead, MN: Eigenvalue intervals for a two-point boundary value problem on a measure chain. Douglas Anderson, Moorhead, MN and Richard Avery, Madison, SD: Existence of three positive solutions to a second-order boundary value problem on a measure chain. Ferhan Merdivenci Atici and G. Sh. Guseinov, Izmir, Turkey: On Green's functions and positive solutions for boundary value problems on time scales. Bernd Aulbach and Christian Pötzsche, Augsburg, Germany: Reducibility of linear dynamic equations on measure chains. Gnana Bhaskar, New Delhi, India: Comparison theorem for a nonlinear boundary value problem on time scales. Chuan Jen Chyan, Taipeh, Taiwan and Johnny Henderson, Auburn, AL: Twin solutions of boundary value problems for differential equations on measure chains. John Davis, Waco, TX and Johnny Henderson, Auburn, AL and Rajendra Prasad, Visakhapatnam, India: Upper and lower bounds for the solution of the general Riccati differential equation on a time scale. Ondrej Dosly, Brno, Czech Republic and Stefan Hilger, Eichstätt, Germany: A necessary and sufficient condition for oscillation of the Sturm-Liouville dynamic equation on time scales. Paul Eloe, Dayton, OH: The method of quasilinearization and dynamic equations on compact measure chains. Lynn Erbe and Allan Peterson, Lincoln, NE: Oscillation criteria for second order matrix dynamic equations on a time scale. G. Guseinov, Izmir, Turkey and Billur Kaymakcalan, Statesboro, GA: On a disconjugacy criterion for second order dynamic equations on time scales. Stefan Hilger, Eichstätt, Germany: Matrix Lie theory and measure chains. Roman Hilscher, Brno, Czech Republic: A time scales version of a Wirtinger type inequality and applications. V. Lakshmikantham, Melbourne, FL and A. Vatsala, Lafayette, LA: Hybrid systems on time scales. Bonita Lawrence, Beaufort, SC: A variety of differentiability results for a multi-point boundary value problem. Christian Pötzsche, Augsburg, Germany: Chain rule and invariance principle on measure chains Stefan Siegmund, Augsburg, Germany: A spectral notion for dynamic equations on time scales. Patricia Wong, NTI, Singapore: Optimal Abel-Gontscharoff interpolation error bounds on measure chains.