Generative adversarial networks have a reliability problem that gets worse, not better, when you point them at time series. A generator and a discriminator locked in adversarial training are already a famously unstable pair — prone to oscillating losses, mode...
It's tempting to assume that generating multivariate synthetic time series is just the univariate problem, done several times in parallel. It isn't — and treating it that way is exactly why so many multivariate synthetic data efforts quietly underperform. A...
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