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We discuss eight new(?) configuration theorems of classical projective geometry in the spirit of the Pappus and Pascal theorems.

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A conjecture regarding the structure of expander graphs is discussed.

Combinatorics · Mathematics 2020-10-20 Itai Benjamini , Mikolaj Fraczyk

In this study, various rotationally symmetric tilings that can be formed using pentagons that are related to rhombus are discussed. The pentagons can be convex or concave and can be degenerated into a trapezoid. If the pentagons are convex,…

Metric Geometry · Mathematics 2022-05-11 Teruhisa Sugimoto

New formulas for the construction of Pythagorean triples and generalizations to equations of higher powers. Application of formulas to some problems, in particular Fermat's equation with n=4.

History and Overview · Mathematics 2023-10-25 Pavlo Deriy

The new form of pentagon equations suggested by Volkov for the $ q $-exponential on the basis of formal series is derived within the Hilbert space framework for the modular version of the quantum dilogarithm.

Quantum Algebra · Mathematics 2012-02-01 L. D. Faddeev

We present an overview of recent experimental and theoretical advances in our understanding of the spin structure of protons and neutrons.

High Energy Physics - Phenomenology · Physics 2011-07-19 B. W. Filippone , Xiangdong Ji

We discuss a new geometric construction of port-Hamiltonian systems. Using this framework, we revisit the notion of interconnection providing it with an intrinsic description. Special emphasis on theoretical and applied examples is given…

Mathematical Physics · Physics 2018-08-29 M. Barbero-Liñán , H. Cendra , E. García-Toraño Andrés , D. Martín de Diego

We apply an old method for constructing points-and-lines configurations in the plane to study some recent questions in incidence geometry.

Metric Geometry · Mathematics 2007-05-23 Noam D. Elkies

This thesis develops the theory of bundle gerbes and examines a number of useful constructions in this theory. These allow us to gain a greater insight into the structure of bundle gerbes and related objects. Furthermore they naturally lead…

Differential Geometry · Mathematics 2007-05-23 Stuart Johnson

Congruent polygons are congruent in angles as well as in edge lengths. We concentrate on the angle aspect, and investigate how tilings of the sphere by congruent pentagons can be determined by the angle information only. We also investigate…

Combinatorics · Mathematics 2026-04-29 Robert Barish , Hoi Ping Luk , Min Yan

We review recent developments in the theory of Thompson group representations related to knot theory.

Geometric Topology · Mathematics 2018-10-16 Vaughan F. R. Jones

The tetrahedron equation in a special substitution is reduced to a pair of pentagon and one ten-term equations. Various examples of solutions are found. $O$-doubles of Novikov, which generalize the Heisenberg double of a Hopf algebra,…

q-alg · Mathematics 2008-02-03 R. M. Kashaev , S. M. Sergeev

We present some new lower bound estimates for certain numbers in Laver table theory and introduce several related structures of interest.

Logic · Mathematics 2025-11-18 Renrui Qi

In this paper we make some observations concerning m-metric spaces and point out some discrepancies in the proofs found in the literature. To remedy this, we propose a new topological construction and prove that it is in fact a…

General Topology · Mathematics 2018-07-03 Samer Assaf

We survey recent developments on the Restriction conjecture.

Classical Analysis and ODEs · Mathematics 2007-05-23 Terence Tao

In this paper, we introduce a new type of coupled fixed point theorem in partially ordered complete metric space. We give an example to support of our result.

General Topology · Mathematics 2017-03-31 Isa Yildirim

The concept of quasi-partial b-metric-like spaces is being introduced and studied with the help of topology. Examples are also discussed to support the results. Some fixed point theorems are proved in the setting of quasi-partial…

General Topology · Mathematics 2018-12-04 Anuradha Gupta , Manu Rohilla

We state and prove a new closure theorem closely related to the classical closure theorems of Poncelet and Steiner. Along the way, we establish a number of theorems concerning conic sections.

Metric Geometry · Mathematics 2013-10-15 Nikolai Beluhov

We give a new simpler proof of a theorem of Jayne and Rogers.

Logic · Mathematics 2011-12-07 Luca Motto Ros , Brian Semmes

New cases of the multiplicity conjecture are considered.

Commutative Algebra · Mathematics 2007-05-23 Juergen Herzog , Xinxian Zheng