Benoit Perthame is a French mathematician known for his work in applied mathematics, particularly in the field of kinetic theory and mathematical biology. He has contributed significantly to the mathematical understanding of certain models, including those related to population dynamics, fluid dynamics, and the behavior of systems described by partial differential equations. In addition to his research work, Benoit Perthame has also been involved in teaching and has published various academic papers and books on subjects within his area of expertise.

Berger's isoembolic inequality is a result in the field of differential geometry, particularly concerning Riemannian manifolds. The inequality deals with the comparison of volumes of geodesic balls (or "volumes" in a more general sense) in Riemannian manifolds that have certain curvature bounds.

Berkner Bank, also known as BBA Community Bank or Berkner Bank of the Americas, is a fictional institution typically referenced in the context of role-playing games, educational simulations, or hypothetical scenarios. It may also appear in discussions about economic systems or community banking within a specified setting.

The complex conjugate of a complex number is obtained by changing the sign of its imaginary part. A complex number is typically expressed in the form: \[ z = a + bi \] where: - \( a \) is the real part, - \( b \) is the imaginary part, and - \( i \) is the imaginary unit with the property \( i^2 = -1 \).

In the context of algebraic geometry and representation theory, a **complex reflection group** is a specific type of symmetry group that arises in the study of regular polytopes and their symmetries, particularly in complex vector spaces. Formally, a complex reflection group is defined as a finite group generated by complex reflections.

Complex systems theory is an interdisciplinary framework used to study systems with many interconnected components that interact in various ways, leading to emergent behavior that cannot be easily understood by simply examining the individual parts. This theory is applicable in various fields such as physics, biology, economics, sociology, computer science, and ecology, among others. Key characteristics of complex systems include: 1. **Non-linearity**: The output of a complex system is not directly proportional to its input.

"Compositions for bagpipe" typically refers to musical works specifically written or arranged for the bagpipe, a traditional wind instrument known for its distinctive sound in various cultural music styles, particularly in Scottish and Irish music. These compositions can include a wide range of genres, from traditional folk tunes and marches to contemporary pieces and cross-genre collaborations.

"Compositions for flute" can refer to a variety of musical works written specifically for the flute, a woodwind instrument known for its agility and wide range. These compositions can include solo flute pieces, flute concertos, chamber music featuring flute, and works for flute and piano or other instruments.

"Compositions for keyboard" generally refers to musical works that are specifically written for keyboard instruments, such as the piano, organ, harpsichord, or synthesizer. These compositions can vary widely in style, form, and complexity, ranging from simple pieces for beginners to intricate works for advanced players. Key elements of keyboard compositions include: 1. **Genres**: They can encompass various musical genres, including classical, jazz, pop, and contemporary styles.

"Compositions for lute" refers to musical pieces specifically written for the lute, a string instrument that was popular during the Renaissance and Baroque periods. The lute has a distinct shape, typically with a rounded back and fretted neck, and it is played by plucking the strings with the fingers or a plectrum. The repertoire for lute includes a variety of genres, such as solo instrumental works, songs with lute accompaniment, and music for ensembles.

A strike, as a unit of measurement, is commonly associated with various contexts, most notably in military and sports terms. Here are a couple of its meanings: 1. **Military Context**: In military terminology, a strike typically refers to an offensive operation or attack aimed at a specific target. This can involve airstrikes, ground assaults, or other coordinated actions.

The term "compression body" can refer to different concepts depending on the context. Here are a few interpretations: 1. **Physics and Mechanics**: In the study of materials and mechanics, a "compression body" may refer to any solid object being subjected to compressive forces. Compressive stress is a force that acts to reduce the volume of the material. When discussing structures or materials, understanding how they behave under compression is important for engineering applications.

Recreational mathematics is a branch of mathematics that is primarily concerned with mathematical games, puzzles, and interesting problems that are enjoyed for their entertainment value rather than for practical applications. It often involves creative thinking, problem-solving skills, and exploration of mathematical concepts in a fun and engaging way. Some common themes in recreational mathematics include: 1. **Puzzles and Games**: This includes everything from logic puzzles and Sudoku to strategy games like chess and checkers.

Tiling puzzles are a type of puzzle or mathematical problem that involves covering a surface with a set of pieces (tiles) without overlaps and ensuring that every part of the surface is covered. These puzzles can take various forms and can be one or two-dimensional in nature. Here are some key characteristics and examples of tiling puzzles: 1. **Types of Tiles**: Tiles can come in various shapes and sizes—squares, rectangles, hexagons, or more complex geometric shapes.

These people have good intentions.

The problem is that they don't manage to go critical because there's to way for students to create content, everything is manually curated.

You can't even publicly comment on the textbooks. Or at least Ciro Santilli hasn't found a way to do so. There is just a "submit suggestion" box.

This massive lost opportunity is even shown graphically at: cnx.org/about (archive) where there is a clear separation between:Maybe this wasn't the case in their legacy website, legacy.cnx.org/content?legacy=true, but not sure, and they are retiring that now.

Thus, OurBigBook.com. License: CC BY! So we could re-use their stuff!

By Rice University.

TODO what are the books written in?