Planar SAT (Satisfiability) is a particular case of the Boolean satisfiability problem (SAT) that involves deciding whether a given Boolean formula can be satisfied under the constraint that the variable or clause interactions can be represented in a planar graph. In general, the classic SAT problem asks whether there exists an assignment of truth values to Boolean variables such that a given formula is true. This can be represented as a graph where nodes represent variables and edges depict the relationships dictated by the clauses.

The 21st century has seen a number of outstanding Israeli mathematicians who have made significant contributions across various fields of mathematics. Some prominent Israeli mathematicians from the 21st century include: 1. **Netta Engelhardt** - Known for her work in mathematical physics and quantum gravity. 2. **Yonatan E. M. Lichtenstein** - Notable for contributions to the theory of dynamical systems and statistical mechanics.

Israeli statisticians are professionals in Israel who specialize in the collection, analysis, interpretation, and presentation of data. They work in various fields, including government, academia, healthcare, finance, and industry. The field of statistics in Israel is supported by several institutions, such as the Central Bureau of Statistics, universities, and research centers. Israeli statisticians might focus on a wide range of topics, including demographic studies, economic modeling, public health data analysis, and social research.

As of my last knowledge update in October 2023, there is no widely recognized person or concept named Asher Kravitz. It's possible that he may be a lesser-known individual, a character from a work of fiction, or a recent public figure who has gained prominence after my last update.

Eli Turkel is known for his contributions in the field of mathematics, particularly in areas related to mathematical research and education. However, without more specific context, it's difficult to provide detailed information on a specific Eli Turkel, as the name may refer to different individuals in various fields.

Gideon Schechtman does not appear to be a widely recognized figure in popular culture, science, or current events as of my last knowledge update in October 2023. It is possible that he is a private individual or a professional in a niche field that hasn't gained significant public attention.

Lee Segel is a prominent figure known for his work in applied mathematics and theoretical biology. He has made significant contributions to the understanding of biological processes through mathematical modeling and has published various papers on topics such as evolutionary biology, population dynamics, and the mathematical modeling of biological systems. In addition to his academic work, Segel has been involved in various interdisciplinary collaborations that bridge science and mathematics. His research and ideas have had a lasting impact on the fields of mathematical biology and biophysics.

Lev M. Bregman is a notable mathematician and researcher known for his work in various fields, particularly optimization, convex analysis, and related areas. He is recognized for developing the concept of Bregman divergence, a generalization of the notion of distance that is often used in optimization and machine learning contexts. Bregman divergence has applications in statistical learning theory and information geometry, among others.

Michael Segal might refer to various individuals, as it is a relatively common name. Without additional context, it's hard to provide a specific answer. 1. **Business or Academic**: There may be professionals in different fields such as business, academia, or consulting named Michael Segal. 2. **Public Figures or Experts**: There could be public figures, authors, or speakers with this name who are known in specific industries or communities.

"Italian mathematician stubs" typically refers to short or incomplete biographical entries about Italian mathematicians on platforms like Wikipedia. These stubs often contain minimal information, such as the mathematician's name, birth and death dates, and perhaps their main contributions to the field of mathematics. Stubs are intended to encourage contributors to expand the entries by adding more detailed information, such as significant achievements, publications, and the context of their work.

The Jericho missile is a series of Israeli ballistic missiles that have been developed and produced by Israel since the 1960s. Primarily, the Jericho missiles are known for their long-range capabilities and are considered part of Israel's nuclear deterrent strategy. The Jericho series includes several generations, with the Jericho I, Jericho II, and Jericho III being the most notable.

Tirosh typically refers to one of two things: 1. **In Biblical Context**: In the Hebrew Bible, Tirosh (תִּירוֹשׁ) is mentioned in several passages and is commonly associated with wine or grape juice. It is often translated as "new wine," referring to the fresh juice extracted from grapes before fermentation. 2. **As a Name**: Tirosh can also be a personal name, particularly in Hebrew-speaking communities.