Tomoyuki Miyaji, Shin-Ichiro Ei, & Masayasu Mimura (Deceased)

A Billiard Problem in Nonlinear Dissipative Systems


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Explanations & Abstract

In classical physics, a billiard problem explores the trajectory of an idealized particle or disk bouncing elastically off rigid boundaries within a closed domain, governed almost entirely by geometry and conservation laws. This book steps into complex nonlinear physics by introducing nonlinear dissipative systems into the equation.

The text centers on self-propelled or localized systems (such as self-propelling rigid disks, pulses, or traveling waves) moving through an environment where energy is continually input and dissipated. Unlike traditional billiard systems where incoming and outgoing angles are strictly equal, the trajectory of a billiard disk in a nonlinear dissipative system is heavily dictated by its own inherent, internal dynamics and localized instabilities upon wall interactions.

The authors utilize center-manifold reductions, bifurcation theory, and numerical tracking methods to show how complex, autonomous boundary reflections emerge from reaction-diffusion and pattern formation frameworks.


️ Table of Contents

While the complete subsection layout remains under publisher finalization for its upcoming release, the primary structure focuses on:

  1. Introduction to Classical vs. Dissipative Billiards

  2. Self-Propelled Particles and Localized Patterns

  3. The Dynamics of a Self-Propelling Rigid Disk near a Boundary

  4. Asymptotic Reflection and Interaction Principles

  5. Bifurcation Analysis of Boundary Collisions

  6. Applications to Reaction-Diffusion Systems

  7. Numerical Experiments and Conclusions

    P.N. Natarajan

    An eminent mathematician and former Professor and Head of the Department of Mathematics at Ramakrishna Mission Vivekananda College, Chennai, India. He has published extensively in the fields of ultrametric analysis and classical summability theory.

    An Introduction to Ultrametric Summability Theory (3rd Edition)


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    Explanations & Abstract

    This book presents a thorough survey of ultrametric summability theory, which is an advanced intersection of a classical branch of mathematics (summability theory) and a modern area of abstract analysis (ultrametric, or non-Archimedean, analysis).

    In traditional calculus and analysis, sequences and series are evaluated over real ($\mathbb{R}$) or complex ($\mathbb{C}$) fields. This text shifts the domain to a complete, non-trivially valued, ultrametric field $K$ (such as the $p$-adic field $\mathbb{Q}_p$). Because ultrametric fields lack standard geometric ordering and classical convexity, many traditional theorems break down (e.g., the standard Hahn-Banach theorem fails).

    The author systematically details how classic matrix transformation methods—such as the Nörlund, Weighted Mean, Euler, and Taylor methods—behave under an ultrametric topology. The 3rd Edition is fully updated and introduces three entirely new chapters dedicated to sequence spaces and summability matrices, reflecting the latest research developments in the field.


    ️ Table of Contents

    Based on the foundational chapters of the theory and the newly expanded 3rd edition structure:

    1. Introduction and Preliminaries

    2. Some Arithmetic and Analysis in $\mathbb{Q}_p$; Derivatives in Ultrametric Analysis

    3. Ultrametric Functional Analysis

    4. Ultrametric Summability Theory

    5. The Nörlund and The Weighted Mean Methods

    6. The Euler and The Taylor Methods

    7. Tauberian Theorems

    8. Silverman–Toeplitz Theorem for Double Sequences and Double Series

    9. The Nörlund Method and The Weighted Mean Method for Double Sequences

    10. Sequence Spaces in Ultrametric Fields (New for 3rd Edition)

    11. Advanced Matrix Transformations and Summability Matrices (New for 3rd Edition)

    12. Recent Developments and Applications in Ultrametric Spaces (New for 3rd Edition)




Leonid Positselski

A prominent research mathematician at the Institute of Mathematics, Czech Academy of Sciences. He is highly recognized for his foundational work in homological algebra, semi-infinite homological algebra, and algebraic geometry.

Contraherent Cosheaves on Schemes


Details
  • Publisher: Birkhäuser (an imprint of Springer Nature)

  • Publication Date: Expected June/September 2026

  • Format: Hardcover (approx. 515 pages)

  • Language: English

  • ISBN-13: 978-3-032-26444-2 (9783032264442)

  • ISBN-10: 3032264448

  • Subject Categories: Algebraic Geometry, Homological Algebra, Category Theory


Explanations & Abstract

The subject of this comprehensive monograph lies on the strict frontier where abstract algebraic geometry meets modern homological algebra.

While quasi-coherent sheaves are standard, universally utilized building blocks in algebraic geometry (acting as the localized equivalent of modules over a ring), their dual counterparts—cosheaves—have historically lacked a widely accepted, well-behaved analogue for general scheme theory.

This volume introduces, details, and develops the theory of contraherent cosheaves. Contraherent cosheaves serve as the proper dual to quasi-coherent sheaves, providing a robust, globalized algebraic framework for cotorsion and contraadjusted modules across various geometric environments. The text heavily explores their interactions with derived and contraderived categories on quasi-compact semi-separated schemes, offering deeper homological tools for algebraic geometers tackling complex, global problems.


️ Table of Contents
 
  1. Introduction  

  2. Contraadjusted and Cotorsion Modules  

  3. Contraherent Cosheaves over a Scheme  

  4. Locally Contraherent Cosheaves  

  5. Derived Categories on Quasi-Compact Semi-Separated Schemes  

  6. Becker's Contraderived Categories on Quasi-Compact Semi-Separated Schemes  

  7. Noetherian Schemes  

  8. Morphisms of Finite Type Between Noetherian Schemes  

Andreas Demleitner

The Classification of Hyperelliptic Groups in Dimension 4


Details

Explanations & Abstract

This monograph explores the geometry of hyperelliptic manifolds, which represent a higher-dimensional generalization of classical hyperelliptic surfaces. Historically classified by Enriques, Severi, and Bagnera-de Franchis, traditional hyperelliptic surfaces are compact complex surfaces characterized by a Kodaira dimension of zero, geometric genus of zero, and irregularity of one.

This text expands these classical ideas to complex tori of arbitrary dimension by quotienting them by finite groups acting freely and without translations. The book's primary focus is providing a complete classification of hyperelliptic manifolds in dimension four—a major milestone that had previously remained unexplored.

By combining techniques from group theory, representation theory, and computer algebra systems (specifically utilizing GAP), the author successfully identifies all finite groups that admit free and translation-free actions on four-dimensional complex tori. Furthermore, the text investigates the torsion order of the canonical divisor for hyperelliptic manifolds in dimensions up to five and highlights deep connections with Iitaka’s conjecture and complex Bieberbach groups.


️ Table of Contents

While the detailed subsection layout is under publisher finalization for its upcoming release, the core architectural chapters of the monograph include:

  1. Introduction and Historical Background

  2. Foundations of Hyperelliptic Manifolds and Complex Tori

  3. Group Actions and Representation Theory Frameworks

  4. Computational Methods using the GAP System

  5. The Classification of Hyperelliptic Groups in Dimension 4

  6. The Torsion Order of the Canonical Divisor in Dimensions $\le 5$

  7. Connections to Iitaka’s Conjecture and Complex Bieberbach Groups

  8. Summary and Future Research Outlines


    Kacha Dzhaparidze

    De Branges' Theory for Processes with Stationary Increments


    Details

    Explanations & Abstract

    This highly specialized volume bridges a fundamental gap between advanced function theory and probability. It focuses on the application of Louis de Branges' theory of entire functions—specifically Hilbert spaces of entire functions—to the structural behavior of stochastic processes with stationary increments.

    Traditional studies of stationary increments rely on standard spectral representations. This work instead leverages de Branges matrix-valued functions and canonical differential systems to study underlying operators, moving average representations, and structural expansions (such as the Karhunen–Loève expansion). The monograph provides essential reading for advanced researchers and graduate students seeking deep geometric and analytic tools within probability theory and complex analysis.


    ️ Table of Contents

    Part I. Functions on a Half-Plane

    Part II. De Branges Spaces of Entire Functions

    Part III. Stochastic Processes with Stationary Increments