Ciro Santilli @cirosantilli 37

This seems like a cool dude. Besides a hardcore scientist, he also made many important contributions to the French education and research system.

No chat only? .... community.jitsi.org/t/chat-function-only/79067

As of 2020: end-to-end encryption optional and turned off as default, and marked as experimental...

Appears to be based on XMPP: community.jitsi.org/t/jitsi-users-is-jitsi-a-regular-xmpp-server/13211

A pre-Jesus-like figure, likely possibly a mentor or competitor with Jesus.

He would have deserved a scene in Jesus Christ Superstar (1973).

Diffeomorphic to the 3 sphere.

A function $\mathbb{R}\to \mathbb{R}$ defined by the second of the Josephson equations plus initial conditions.

It represents an internal state of the junction.

Show up when solving the Laplace's equation on spherical coordinates by separation of variables, which leads to the differential equation shown at: en.wikipedia.org/w/index.php?title=Legendre_polynomials&oldid=1018881414#Definition_via_differential_equation.

Appears directly on Schrödinger equation! And in particular in the time-independent Schrödinger equation.

Allows you to connect two adjacent pins of a pin header. Sometimes used as a hardware configuration interface!