Ciro Santilli @cirosantilli 40

Funding rounds:

About their qubit:

A linear map $A$ can be seen as a (1,1) tensor because:is a number, $v\ast$. is a dual vector, and W is a vector. Furthermoe, $T$ is linear in both $v\ast$ and $w$. All of this makes $T$ fullfill the definition of a (1,1) tensor.

Allele means "other" in Greek.

atlas.brain-map.org/ omg some amazing things there.

Grouping their mouse brain projcts here.

This situation is the most bizarre thing ever. The dude was fired in 2020, but he refused to be fired, and because he has the company seal, they can't fire him. He is still going to the office as of 2022. It makes one wonder what are the true political causes for this situation. A big warning sign to all companies tring to setup joint ventures in China!

In this project Ciro Santilli extracted (almost) all Git commit emails from GitHub with Google BigQuery! The repo was later taken down by GitHub. Newbs, censoring publicly available data!

Ciro also created a beautifully named variant with one email per commit: github.com/cirosantilli/imagine-all-the-people. True art. It also had the effect of breaking this "what's my first commit tracker": twitter.com/NachoSoto/status/1761873362706698469

Following the definition of the indefinite orthogonal group, we want to show that only the metric signature matters.

First we can observe that the exact matrices are different. For example, taking the standard matrix of $O(2)$:and:both have the same metric signature. However, we notice that a rotation of 90 degrees, which preserves the first form, does not preserve the second one! E.g. consider the vector $x=(1,0)$, then $x\cdot x=1$. But after a rotation of 90 degrees, it becomes $x_2=(0,1)$, and now $x_2\cdot x_2=2$! Therefore, we have to search for an isomorphism between the two sets of matrices.

For example, consider the orthogonal group, which can be defined as shown at the orthogonal group is the group of all matrices that preserve the dot product can be defined as:

Single chemical element, single phase (usually solid), but different 3D structures.

The prototypical examples are the allotropes of carbon such as diamond vs graphite.