= Hans Petter Langtangen
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Hans Petter Langtangen coauthored a text on <finite difference methods> for <partial differential equations> with <Svein Linge>. Its treatment of <diffusion equations> derives discrete updates and investigates their stability. The connection between an explicit <Euler method> and a spatial second-difference operator makes the restriction on the time step visible in a reproducible computational model.<Finite Difference Computing with PDEs by Hans Petter Langtangen and Svein Linge>[Chapter 3, Section 3.1]{ref}
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