# Tag: calculus

- Solved – How to differentiate the distribution function of lognormal distribution with respect to its parameters
- Solved – Calculating t-SNE gradient (a mistake in the original t-SNE paper)
- Solved – Relationship between first and second order condition of convexity
- Solved – gradient versus partial derivatives
- Solved – Under the 0-1 loss function, the Bayesian estimator is the mode of the posterior distribution
- Solved – Derivation of M step for Gaussian mixture model
- Solved – How to obtain the standard error for a slope at a given data point, for curvilinear regression
- Solved – Finding the slope at different points in a sigmoid curve
- Solved – Why is optimisation solved with gradient descent rather than with an analytical solution?
- [Physics] the curl of $k\hat{r}/r^n$