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The Lax–Friedrichs method, named after Peter Lax and Kurt O. Friedrichs, is a numerical method for the solution of hyperbolic partial differential equations based on finite differences. The method can be described as the FTCS (forward in time, centered in space) scheme with a numerical dissipation term of 1/2. One can view the Lax–Friedrichs method as an alternative to Godunov's scheme, where one avoids solving a Riemann problem at each cell interface, at the expense of adding artificial viscosity.
Lax–Friedrichs Method - Wikipedia
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This adaptive rationale leads to differential fitness and relative survival. All in all, adaptivity involves finding a balance between coherence and diversity, robustness and dynamics, and order and chaos. This balance is called ‘fitness’ or ‘resilience’.
(PDF) Complexity and Planning: Systems, Assemblages and Simulations
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To men immersed day and night in these meditations comes understanding of the truth pronounced by the god at Delphi, that the mind should know itself; and there comes also the perception of its union with the divine mind, the source of its inexhaustible joy
On the Good Life
Marcus Tullius Cicero
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