A Fingerloop braid is a type of braiding technique used to create decorative cord or textile patterns. It involves the use of loops made with the fingers to interlace strands of yarn or thread, resulting in a flat or sometimes three-dimensional braid. This technique has historical significance and has been used in various cultures for centuries, particularly in medieval and Renaissance Europe.

A cyclic number is a special type of integer that has a unique property regarding its digits. This property is primarily exhibited when the number is multiplied by integers from 1 to n, where \( n \) is the number of digits in the cyclic number. The result will produce a permutation of the original number's digits. The most well-known example of a cyclic number is 142857, which is the decimal expansion of \( \frac{1}{7} \).

The Golomb-Dickman constant, often denoted by \( \lambda \), is a mathematical constant that arises in number theory, specifically in the study of the distribution of the lengths of the longest increasing subsequences of permutations.

The Riemann Series Theorem, also known as the Riemann rearrangement theorem, is a result in the field of analysis concerning the summation of series of real or complex numbers. The theorem states that if a series is conditionally convergent, the terms of that series can be rearranged in such a way that the rearranged series converges to any real number, or even diverges.

The Neighborly polytope is a specific type of convex polytope that is defined based on its combinatorial properties concerning its vertices.

The Jackson integral is a generalization of the Riemann integral and is associated with the theory of q-calculus. It is named after the mathematician George Johnstone Stokes Jackson, who introduced the concept in the context of q-series and q-analogs of various mathematical concepts.

Mock modular forms are a type of mathematical function that generalize the concept of modular forms. They arise in number theory and have connections to various areas, including combinatorics, topology, and mathematical physics. ### Background A **modular form** is a complex function that satisfies certain transformation properties under the action of a subgroup of the modular group, along with specific growth conditions at infinity.

The "Happy Ending Problem" is a classic problem in combinatorial geometry that involves points in a plane. Specifically, it refers to the question of whether a set of points in the plane can be connected to form a convex polygon, and it is typically framed in the context of points positioned in general position (i.e., no three points are collinear).

Szemerédi's theorem is a fundamental result in combinatorial number theory which pertains to arithmetic progressions in sets of integers. Specifically, the theorem states that for any positive integer \( k \), any subset of the integers with positive density contains a non-trivial arithmetic progression of length \( k \). More formally, if \( A \) is a subset of the positive integers with positive upper density, i.e.

Clausen's formula, named after the mathematician Carl Friedrich Gauss and further developed by the German mathematician Karl Clausen, is a formula related to the sums of powers of integers, particularly relevant in number theory and combinatorics. More specifically, Clausen's formula provides a means to express sums of powers of integers in terms of Bernoulli numbers.

The Debye function is a mathematical function that arises in the study of thermal properties of solids, particularly in the context of specific heat and phonon statistics. It is named after the physicist Peter Debye, who introduced it in the early 20th century as part of his work on heat capacity in crystalline solids. The Debye function is used to describe the contribution of phonons (quantized modes of vibrations) to the heat capacity of a solid at low temperatures.

An entire function is a complex function that is holomorphic (i.e., complex differentiable) at all points in the complex plane. In simpler terms, an entire function is a function that can be represented by a power series that converges everywhere in the complex plane. ### Characteristics of Entire Functions: 1. **Holomorphic Everywhere**: Entire functions are differentiable in the complex sense at every point in the complex plane.

The Griewank function is a commonly used test function in optimization and is particularly known for its challenging properties, making it suitable for evaluating optimization algorithms.

The Herglotz–Zagier function is a complex analytic function that arises in the context of number theory and several areas of mathematical analysis. This function is typically expressed in terms of an infinite series and is significant due to its properties related to modular forms and other areas of mathematical research.

The Lamé functions are special functions that arise as solutions to Lamé's differential equation, which is a second-order linear differential equation associated with the problem of a particle constrained to move on an ellipsoid.

A modular form is a complex function that has certain transformation properties and satisfies specific conditions.

The \(\text{sinhc}\) function, often represented as \(\text{sinhc}(x)\), is defined mathematically as: \[ \text{sinhc}(x) = \frac{\sinh(x)}{x} \] for \(x \neq 0\), and \(\text{sinhc}(0) = 1\).

A trigonometric integral is a type of integral that involves trigonometric functions such as sine (sin), cosine (cos), tangent (tan), and their reciprocals or inverses. These integrals often arise in a variety of contexts, including physics, engineering, and mathematics, particularly in calculus when dealing with periodic functions or problems involving angles.

Walsh functions are a set of orthogonal functions that are used in various fields, including signal processing, communications, and computer science. They are defined over the interval [0, 1] and can be extended to other intervals or dimensions. Walsh functions are particularly known for their simplicity and can be represented in a binary form.

Dyson's transform, also known as the Dyson series, is a mathematical tool used primarily in quantum mechanics and quantum field theory. It provides a way to express the time evolution of a quantum state in terms of the interaction Hamiltonian when the system is subject to a time-dependent potential or interaction.