Ciro Santilli @cirosantilli 37

Double cover of $SO(3)$.

Isomorphic to the quaternions.

TODO understand better, mentioned e.g. at Subtle is the Lord by Abraham Pais (1982) page 20, and is something that Einstein worked on.

Ciro Santilli likes Magic: The Gathering and he was pleased when he learned that Steve Wozniak does too, and has an expensive collection: redsunsoft.com/2019/03/how-a-post-to-play-magictg-turned-into-an-afternoon-with-the-woz/

This is basically how quantum computing was first theorized by Richard Feynman: quantum computers as experiments that are hard to predict outcomes.

TODO answer that: quantumcomputing.stackexchange.com/questions/5005/why-it-is-hard-to-simulate-a-quantum-device-by-a-classical-devices. A good answer would be with a more physical example of quantum entanglement, e.g. on a photonic quantum computer.

In the case of the Schrödinger equation solution for the hydrogen atom, each orbital is one eigenvector of the solution.

Remember from time-independent Schrödinger equation that the final solution is just the weighted sum of the eigenvector decomposition of the initial state, analogously to solving partial differential equations with the Fourier series.

This is the table that you should have in mind to visualize them: en.wikipedia.org/w/index.php?title=Atomic_orbital&oldid=1022865014#Orbitals_table

Basically a synonym for second quantization.

Cute synonym for second brain, sample usage: beepb00p.xyz/exobrain/#cntnt

Huge respect to this companies.

Makes RNA from RNA.

Used in Positive-strand RNA virus to replicate.

I don't think it's present outside viruses. Well regulated organisms just transcribe more DNA instead.

www.youtube.com/watch?v=6DxlkxA82FM COVID-19 Symposium: Entry of Coronavirus into Cells | Dr. Paul Bates

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