In this expository article I will review some constructions of bi-invariant metrics on the contactomorphism group, and how these metrics are related to some other global rigidity phenomena in contact topology which have been discovered in the last few years, in particular the notion of orderability (due to Eliashberg and Polterovich) and an analogue in contact topology (due to Eliashberg, Kim and Poltorovich) of Gromov's symplectic non-squeezing theorem..

Whenever the channels of diplomatical communication between the United States and France shall be opened, I shall demand satisfaction for the insult and reparation for the injury.

The Home Nurse who, from Christian principle, patiently and unmurmuringly endures the so-often ungracious observations, the supercilious compassionings, the idle, peevish complaints […]

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