A function is a rule that is applied to one set of values to give another set of values. A function can be illustrated on a graph – points are plotted as coordinates and joined by either a straight ...

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Saving equations in a calculator can be useful for many reasons. You may want to store equations in a calculator so they can be graphed. You may also want to save an equation so you can see what you ...

In this paper we give a sufficient condition on the cubic nonlinearity for the global existence of a small amplitude solution to the one dimensional Schrödinger equations with cubic nonlinearity, ...