Mathematics – Probability
Scientific paper
2012-03-05
Mathematics
Probability
v4, 30 pages. Minor improvements in the presentation. Typos corrected -- especially in theorem 33, hypothesis (6.3), on mean f
Scientific paper
We show in this work how the familiar Taylor formula can be used in a simple way to reprove from scratch the main existence and well-posedness results from rough paths theory; the explosion question, convergence of Euler schemes and Taylor expansion are also dealt with. Unlike other approaches, we work mainly with flows of maps rather than with paths. We illustrate our approach by proving a well-posedness result for some mean field stochastic rough differential equation.
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