The title says it all; by now, I have learned quite a few numerical methods for finding the roots of a function that is differentiable. However, I haven't heard of any strategy or method analogous for functions that are either discontinuous or indifferentiable. Are there any well known theories or works surrounding this topic?
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Bisection works for continuous functions. – Paul Apr 08 '20 at 19:09
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Do you know any nondifferentiable functions whose zeros are interesting? If yes, then this would be a valuable addition to your question. – Carl Christian Apr 09 '20 at 22:34