Upper Bound 24 A posteriori error estimates 4 Algorithms 4 Competitive ratio 4 Computation theory 4 Guaranteed upper bound 4 Lower and upper bounds 4 On-line algorithms 4 Robustness 4 Singularly perturbed reaction-diffusion problem 4 Vertex-centered finite volume/finite volume element/box method 4 A posteriori error estimators 2 A-posteriori error estimates 2 A-thermal 2 ATLAS detectors 2 Action recognition 2 Adaptive procedure 2 Aircraft accidents 2 Aircraft collisions 2 Algebra 2 Algorithmics 2 Analysis techniques 2 Arbitrary order 2 Arithmetic circuit 2 Arithmetic operations 2 Artificial intelligence 2 Atomic physics 2 Automatic programming 2 Bins 2 Bosons 2