Typo in def of L-smoothness

[chriskolb]

The "Deep dive on GD and optimality" video just popped up on my youtube feed and I think the definition of L-smoothness contains a typo. Instead of

|| \nabla \fx - \nabla f(\tilde{\xv}) || \le L ||\fx - f(\tilde{\xv}) || \quad \text{ for all } \xv, \tilde{\xv}

I think it should be

|| \nabla \fx - \nabla f(\tilde{\xv}) || \le L ||\xv - \tilde{\xv} || \quad \text{ for all } \xv, \tilde{\xv}

lecture_optimization/slides/04-multivariate-first-order/slides-multivar-first-order-3-gd-deepdive-optimality.tex

Line 49 in 67a1b17

|| \nabla \fx - \nabla f(\tilde{\xv}) || \le L ||\fx - f(\tilde{\xv}) || \quad \text{ for all } \xv, \tilde{\xv}

(source e.g. here https://www.stat.cmu.edu/~ryantibs/convexopt-F13/scribes/lec6.pdf)