David Singmaster is a British mathematician and computer scientist known for his work in the field of combinatorial puzzles, most notably the Rubik's Cube. He is recognized for developing the Singmaster notation, which is a way to describe the moves and algorithms used when solving the Rubik's Cube. His contributions have been influential in the community of Rubik's Cube enthusiasts and in the study of combinatorial puzzles more broadly.

Dana S. Richards may refer to a specific individual, but without additional context, it is difficult to provide more detailed information. There are various people with that name, including professionals in different fields. If you mean a specific Dana S.

Colm Mulcahy is a mathematician and educator, known for his work and contributions in the field of mathematics, particularly in areas such as mathematical card magic and mathematical puzzles. He is also recognized for his engaging teaching style and for promoting mathematics through various outreach activities, including workshops and lectures. Additionally, he has authored papers and articles that explore mathematical concepts in an accessible way.

Burkard Polster is a mathematician known for his work in the field of mathematics, particularly in algebra and geometry. He is also recognized for his contributions to mathematical education and outreach, including his efforts to make complex mathematical concepts accessible to a wider audience. He is notable for his involvement in mathematical problem-solving and for creating educational content that engages students and the general public.

Bram Cohen is an American computer programmer and entrepreneur best known as the creator of the BitTorrent protocol, which allows for the efficient sharing of large files over the internet. He developed BitTorrent in 2001 as a way to facilitate faster downloads by allowing multiple users to share portions of the same file simultaneously. This peer-to-peer (P2P) technology significantly changed the way digital content is distributed online. Cohen founded BitTorrent, Inc.

Boris Kordemsky (born in 1915, died in 1999) was a notable Russian mathematician, known especially for his contributions to mathematical puzzles and recreational mathematics. He authored several books that made mathematical concepts more accessible and engaging for the general public. His work often focused on the enjoyment and beauty of mathematics, helping to popularize the subject through puzzles and games.

Alexander Bogomolny is a mathematician known primarily for his work in the field of mathematics education and his contributions to the popularization of mathematical concepts through various online resources. He is the creator of the website "Cut-the-Knot," which features a wealth of mathematical problems, puzzles, and explanations designed to engage learners and enthusiasts in mathematics. The site covers a variety of topics, including geometry, number theory, and mathematical games, and is appreciated for its clear explanations and interactive elements.

A. K. Dewdney is a Canadian mathematician, computer scientist, and author, known for his work in the fields of mathematics, computer science, and popular science writing. He has written several books and articles on topics ranging from mathematics and science to the philosophical implications of technology. One of his notable contributions is in the realm of recreational mathematics, where he has explored interesting mathematical puzzles and concepts.

Will Sawin could refer to a few different contexts, but not enough detail was provided for a specific answer. If you are referring to a person, it might relate to an individual who is known in a specific field, such as academia or public life. For example, Will Sawin is associated with work in mathematics, particularly in areas like algebraic geometry.

As of my last update in October 2023, there is no widely recognized concept, product, or individual known as "Shai Evra." It might be a term specific to a niche field, a recent development, or a personal name not widely covered in available sources.

Ruixiang Zhang is not a widely recognized term in popular knowledge or culture as of my last update. It might refer to a person, a brand, a fictional character, or something else that was not well-known or established before October 2023.

Thomas Edison (1847–1931) was an American inventor and businessman who is best known for his contributions to the development of electric power generation and numerous inventions that have had a significant impact on modern technology. He is often credited with developing the first commercially viable incandescent light bulb and for establishing the first industrial research laboratory. Edison's most notable inventions include the phonograph, the motion picture camera, and improvements to the telegraph and the telephone.

Amos Maritan is a name that may refer to an individual associated with academic work, research, or a specific field of study. However, there is limited publicly available information about them, so they may not be a widely recognized figure in popular culture or scholarship as of my last update in October 2023.

Sum-of-squares optimization is a mathematical approach used primarily in the context of optimizing functions, particularly in the fields of statistics, data fitting, and machine learning. The term generally refers to minimizing the sum of the squares of differences between observed values and values predicted by a model. This method is often employed in regression analysis and linear modeling.

A **subanalytic set** is a concept from the field of real algebraic geometry and model theory, particularly within the framework of o-minimal structures. A set is considered subanalytic if it can be defined using certain operations applied to analytic sets in a Euclidean space.

Semidefinite programming (SDP) is a subfield of convex optimization that deals with the minimization of a linear objective function subject to semidefinite constraints.

A **semialgebraic space** is a concept primarily arising in the field of real algebraic geometry and relates to the study of sets defined by polynomial inequalities.