An Erdős–Woods number is a specific type of integer related to the study of sets of consecutive integers and their relationships to prime numbers. More formally, an integer \( n \) has an Erdős–Woods number if there exists a positive integer \( k \) such that the set of integers: \[ \{ n, n+1, n+2, \ldots, n+k \} \] contains \( k \) or more prime numbers.

John Thompson's Guqin website.

Holy crap amazing list of Guqin pieces by the guy for MP3 download! www.silkqin.com/06hear.htm And the explanations are insane. What a dude. Ciro Santilli's hero.

Download all MP3:

Ciro Santilli Contacted John by email in 2019 telling him to put his stuff on YouTube and offering help, and he replied, but nothing came of it unfortunately. Edit: he uploaded a bunch of videos of him playing live in 2020! www.youtube.com/user/silkqin/videos

John focuses on playing the tunes in a "historically informed performance", in particular using silk strings rather than metal ones which are used by most modern artists: www.silkqin.com/08anal/hip.htm

TODO identify better:

Some free online collections:** collections.si.edu/search/results.htm?q=&fq=online_visual_material%3Atrue&fq=online_media_type%3A%22Images%22&fq=culture%3A%22Chinese%22&fq=object_type%3A%22Paintings%22&view=list&date.slider=300s%2C1800s

Unclear legality:

A Hankel matrix is a specific type of structured matrix that has the property that each ascending skew-diagonal from left to right is constant. In more formal terms, a Hankel matrix is defined by its entries being determined by a sequence of numbers; the entry in the \(i\)-th row and \(j\)-th column of the matrix is given by \(h_{i,j} = a_{i+j-1}\), where \(a\) is a sequence of numbers.

Triton is the largest moon of Neptune and the seventh-largest moon in the solar system. It was discovered on October 10, 1846, by British astronomer William Lassell just 17 days after the discovery of Neptune itself. Triton is particularly interesting for several reasons: 1. **Retrograde Orbit**: Triton has a unique retrograde orbit, meaning it orbits Neptune in the opposite direction to the planet's rotation.

Russian cryptographers are individuals from Russia who specialize in the study and practice of cryptography, which is the science of securing communication and information by transforming it into a secure format. This field encompasses a variety of techniques and methodologies for encoding messages, ensuring confidentiality, integrity, authentication, and non-repudiation. Historically, Russia has a prominent role in the development of cryptographic techniques and cryptographic theory, especially during the Cold War era, when secure communication was vital for national security.

Siarnaq is a celestial body, specifically a moon of the planet Saturn. It is one of the smaller moons of Saturn and is classified as a member of the irregular moons, which tend to have eccentric and inclined orbits. Siarnaq was discovered in 2000, and it is named after a figure in Inuit mythology. The moon is characterized by its distinctive features, including a relatively dark surface and a composition thought to be primarily composed of ice and rock.

The 60th meridian west is a line of longitude that is 60 degrees west of the Prime Meridian, which is located at 0 degrees longitude. This meridian runs from the North Pole to the South Pole and passes through several countries in North America and South America, including parts of Canada, the United States, and countries in the Caribbean and South America, such as Colombia.

Linear motion refers to the motion of an object along a straight path. It can be described in terms of displacement, velocity, acceleration, and time. In linear motion, the position of an object changes in a straight line and can be characterized by the following key concepts: 1. **Displacement**: The shortest distance from the initial position to the final position of the object, which includes the direction of the movement.

The Treaty of Zaragoza, signed on April 22, 1529, was an agreement between Spain and Portugal that established a maritime boundary between the two nations in the Spice Islands, also known as the Moluccas. This treaty was a follow-up to the Treaty of Tordesillas, which had previously divided the newly discovered lands outside Europe between Spain and Portugal.

Yevgeny Dyakonov is a Russian scientist known for his work in the field of theoretical physics, particularly in areas related to condensed matter physics and electromagnetism. He is recognized for contributions to the study of electromagnetic phenomena, spintronics, and related materials.