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Mathematics of Computation

Published by the American Mathematical Society since 1960 (published as Mathematical Tables and other Aids to Computation 1943-1959), Mathematics of Computation is devoted to research articles of the highest quality in computational mathematics.

ISSN 1088-6842 (online) ISSN 0025-5718 (print)

The 2020 MCQ for Mathematics of Computation is 1.78.

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Approximate solutions of generalized Riemann problems for nonlinear systems of hyperbolic conservation laws
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by Claus R. Goetz and Armin Iske PDF
Math. Comp. 85 (2016), 35-62 Request permission


We study analytical properties of the Toro-Titarev solver for generalized Riemann problems (GRPs), which is the heart of the flux computation in ADER generalized Godunov schemes. In particular, we compare the Toro-Titarev solver with a local asymptotic expansion developed by LeFloch and Raviart. We show that for nonlinear scalar problems in 1D the Toro-Titarev solver reproduces the truncated Taylor series expansion of LeFloch-Raviart exactly, whereas for nonlinear systems the Toro-Titarev solver introduces an error whose size depends on the height of the jump in the initial data. Thereby, our analysis answers open questions concerning the justification of simplifying steps in the Toro-Titarev solver. We illustrate our results by giving the full analysis for a nonlinear $2$-by-$2$ system and numerical results for shallow water equations and a system from traffic flow.
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Additional Information
  • Claus R. Goetz
  • Affiliation: Department of Civil, Environmental and Mechanical Engineering, University of Trento, via Mesiano 77, I-38123 Trento, Italy
  • Email:
  • Armin Iske
  • Affiliation: Department of Mathematics, University of Hamburg, Bundesstr. 55, D-20146 Hamburg, Germany
  • MR Author ID: 600018
  • Email:
  • Received by editor(s): September 4, 2013
  • Received by editor(s) in revised form: April 24, 2014
  • Published electronically: May 13, 2015
  • © Copyright 2015 American Mathematical Society
  • Journal: Math. Comp. 85 (2016), 35-62
  • MSC (2010): Primary 65M08; Secondary 65D15, 58J45, 35L65
  • DOI:
  • MathSciNet review: 3404442