21. As with any highly complex system, however, even small perturbations to its environment can lead to significant functional disruptions. 22. In addition, the report authors argue that small perturbations in the food supply are highly amplified for malnourished populations. 23. In particular, they have shown that dynamics on a chaotic attractor can be controlled by using only small perturbations . 24. The instability analysis behind the Darrieus Landau instability considers a planar, premixed flame front subjected to very small perturbations . 25. For a typical zero-finding algorithm to work well, small perturbations of the input must produce smooth effects in the output. 26. It uses general relativity to compute the gravitational forces causing small perturbations to grow and eventually seed the formation of clusters. 27. This happens when the system we wish to describe cannot be described by a small perturbation imposed on some simple system. 28. Such perturbation cannot be considered as small : a transition to a new mode exceeds the range of very small perturbations . 29. Studies of the Moon's physical librations ( small perturbations to its rotation ) furthermore indicate that the core is still molten. 30. A spacetime is stably causal if it cannot be made to contain closed causal curves by arbitrarily small perturbations of the metric.
