Personal knowledge base Updated +Created
Physical Review Letters article Updated +Created
Playstation games Updated +Created
Bell state Updated +Created
One of the four following states:
When unqualified as in "the Bell state", it generally just means .
The Bell states are entangled and non-separable. Intuitively, we can see that when we measure that state, the values of the first and second bit are strictly correlated. This is the hallmark of quantum computation: making up states where qubits are highly correlated to match a specific algorithmic answer, and opposed to uniformly random noise. For example, the Bell state circuit is a common hello world, e.g. it is used in the official Qiskit hello world.
Bezos Academy Updated +Created
Bezos Academy is building a network of tuition-free, Montessori-inspired preschools in underserved communities.
Elliptic curve point addition Updated +Created
Elliptic curve point addition is the group operation of an elliptic curve group, i.e. it is a function that takes two points of an elliptic curve as input, and returns a third point of the elliptic curve as its output, while obeying the group axioms.
The operation is defined e.g. at en.wikipedia.org/w/index.php?title=Elliptic_curve_point_multiplication&oldid=1168754060#Point_operations. For example, consider the most common case for two different points different. If the two points are given in coordinates:
then the addition is defined in the general case as:
with some slightly different definitions for point doubling and the identity point.
This definition relies only on operations that we know how to do on arbitrary fields:and it therefore works for elliptic curves defined over any field.
Just remember that:
means:
and that always exists because it is the inverse element, which is guaranteed to exist for multiplication due to the group axioms it obeys.
The group function is usually called elliptic curve point addition, and repeated addition as done for DHKE is called elliptic curve point multiplication.
Figure 1.
Visualisation of elliptic curve point addition
. Source.
Elon Musk Updated +Created
Musk is a truly ambivalent personality. Some points are very good. Some are very bad.
Respect on the technical side by Ciro Santilli.
But the way he treated his first wife Justine Musk, is very very weird, incomprehensible: www.marieclaire.com/sex-love/a5380/millionaire-starter-wife/
Positive Cirocoins for possibly going to reverse Twitter's unfair Trump ban if his Twitter acquisition goes through:
Negative Cirocoins for according to Wikipedia:
Within the merged company [Thiel's Confinity + Elon's X.com], Musk returned as CEO. Musk's preference for Microsoft software over Unix created a rift in the company and caused Thiel to resign.
Video 1.
The REAL Reason Why Tesla Made All Patents Open-Source by The not so boring Man (2021)
Source. Supercut from various interviews/presentations in which Elon saying that Tesla has open source patents and pro open source stuff. Can we trust it? Maybe.
Romance of the Three Kingdoms event Updated +Created
satoshin@gmx.com Updated +Created
Steganography Updated +Created
A Hundred Birds Pay Homage to the Phoenix Updated +Created
Video 1.
A Hundred Birds Pay Homage to the Phoenix with suona solo performed by Li Guangcai
. Source.
Cool data embedded in the Bitcoin blockchain / AtomSea & EMBII data format Updated +Created
For a detailed analysis of one transaction see: Nelson-Mandela.jpg.
Best guess so far, all in ASCII hex of output scripts:
Coordinate chart Updated +Created
Mr. SQUID Updated +Created
This is the cutest product name ever.
Since 1992, Mr. SQUID has been the standard educational demonstration system for undergraduate physics lab courses.
YBCO device, runs on liquid nitrogen.
Point groups in two dimensions Updated +Created
Binary data Updated +Created
Binary large object Updated +Created
Less evil are BLOBs that come from Reproducible builds.
Bipolar junction transistor Updated +Created
As of 2020, not used anymore in logic gates, but still used in amplifiers.

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