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Didier
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I have been called an "autocratic teacher or professor who are blindly driving his/her students along the bloody path of his/her interest" once. But I prefer "Didier", which is shorter.

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27
An example of an open ball whose closure is strictly between it and the corresponding closed ball
14
What's the "best" place for working in Manifolds/Surfaces?
13
If $M$ is a compact Riemannian manifold and $g$ and $\tilde{g}$ are metrics on $M$, then $\frac{1}{C} g \leq \tilde{g} \leq C g$ for $C > 1$
13
Why are we interested in Einstein metrics?
13
Example of a function that is continuous at $c$ whose inverse is discontinuous at $f(c)$

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