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In his monograph On Numbers and Games, J. H. Conway introduced a real-closed field No of surreal numbers containing the reals and the ordinals, as well as a vast array of less familiar numbers. A longstanding aim has been to develop…

Logic · Mathematics 2015-08-26 Ovidiu Costin , Philip Ehrlich , Harvey M. Friedman

The class $\mathbf{No}$ of surreal numbers, which John Conway discovered while studying combinatorial games, possesses a rich numerical structure and shares many arithmetic and algebraic properties with the real numbers. Some work has also…

Classical Analysis and ODEs · Mathematics 2015-05-21 Simon Rubinstein-Salzedo , Ashvin Swaminathan

The class of surreal numbers, denoted by $\textbf{No}$, initially proposed by Conway, is a universal ordered field in the sense that any ordered field can be embedded in it. They include in particular the real numbers and the ordinal…

Logic · Mathematics 2022-11-16 Olivier Bournez , Quentin Guilmant

Surreal numbers, have a very rich and elegant theory. This class of numbers, denoted by No, includes simultaneously the ordinal numbers and the real numbers, and forms a universal huge real closed field: It is universal in the sense that…

Logic · Mathematics 2022-01-21 Olivier Bournez , Quentin Guilmant

Conway's field No of surreal numbers comes both with a natural total order and an additional "simplicity relation" which is also a partial order. Considering No as a doubly ordered structure for these two orderings, an isomorphic copy of No…

Logic · Mathematics 2023-05-04 Vincent Bagayoko , Joris van der Hoeven

The proper class of Conway's surreal numbers forms a rich totally ordered algebraically closed field with many arithmetic and algebraic properties close to those of real numbers, the ordinals, and infinitesimal numbers. In this paper, we…

Logic in Computer Science · Computer Science 2024-10-02 Karol Pąk , Cezary Kaliszyk

In [26], the algebraico-tree-theoretic simplicity hierarchical structure of J. H. Conway's ordered field $\mathbf{No}$ of surreal numbers was brought to the fore and employed to provide necessary and sufficient conditions for an ordered…

Logic · Mathematics 2021-06-24 Philip Ehrlich , Elliot Kaplan

On Cuesta-Conway numbers as an extension of Cantor's ordinals: A short introduction to surreal numbers. The class of Cuesta-Conway numbers, the surreal numbers, can be defined simply, starting from their normal forms (families of…

Logic · Mathematics 2022-04-18 Labib Haddad

In the main part of the paper, on the basis of contour integration of complex meromorphic functions whose singularities lie onto an integration contour, in the first step, a concept of improper integrals absolute existence of meromorphic…

Classical Analysis and ODEs · Mathematics 2007-05-23 Branko Saric

For any ordinal $\alpha > 0$, we show how to define a hyperexponential $E_{\omega^{\alpha}}$ and a hyperlogarithm $L_{\omega^{\alpha}}$ on the class $\mathbf{No}^{>, \succ}$ of positive infinitely large surreal numbers. Such functions are…

Logic · Mathematics 2023-10-24 Vincent Bagayoko , Joris van der Hoeven

Let No be Conway's class of surreal numbers. I will make explicit the notion of a function f on No recursively defined over some family of functions. Under some "tameness" and uniformity condition, f must satisfy some interesting…

Logic · Mathematics 2007-05-23 Antongiulio Fornasiero

The notion of surreal number was introduced by J.H. Conway in the mid 1970's: the surreal numbers constitute a linearly ordered (proper) class $No$ containing the class of all ordinal numbers ($On$) that, working within the background set…

Category Theory · Mathematics 2019-12-02 Dimi Rocha Rangel , Hugo Luiz Mariano

An order theoretic and algebraic framework for the extended real numbers is established which includes extensions of the usual difference to expressions involving $-\infty$ and/or $+\infty$, so-called residuations. Based on this,…

Optimization and Control · Mathematics 2014-03-13 Andreas H. Hamel , Carola Schrage

In his monograph, H. Gonshor showed that Conway's real closed field of surreal numbers carries an exponential and logarithmic map. Subsequently, L. van den Dries and P. Ehrlich showed that it is a model of the elementary theory of the field…

Commutative Algebra · Mathematics 2016-10-10 Salma Kuhlmann , Mickaël Matusinski

The proper Class $\bf{No}$ of all Conway's numbers $\cite{l3}$ is considered as a region of investigation. It turns out to be a total ordered Field (i.e., a field whose domain is a proper Class) and this totally, or linear ordered Class,…

Logic · Mathematics 2024-06-19 Ju. T. Lisica

A natural connection between rational functions of several real or complex variables, and subspace collections is explored. A new class of function, superfunctions, are introduced which are the counterpart to functions at the level of…

Algebraic Geometry · Mathematics 2016-02-23 Graeme W. Milton

We give a presentation of Conway's surreal numbers focusing on the connections with transseries and Hardy fields and trying to simplify when possible the existing treatments.

Logic · Mathematics 2020-08-18 Alessandro Berarducci

We show that \'Ecalle's transseries and their variants (LE and EL-series) can be interpreted as functions from positive infinite surreal numbers to surreal numbers. The same holds for a much larger class of formal series, here called…

Logic · Mathematics 2024-01-24 Alessandro Berarducci , Vincenzo Mantova

In [15], the algebraico-tree-theoretic simplicity hierarchical structure of J. H. Conway's ordered field No of surreal numbers was brought to the fore and employed to provide necessary and sufficient conditions for an ordered field to be…

Logic · Mathematics 2015-12-15 Philip Ehrlich , Elliot Kaplan

We study subfields of surreal numbers, called hyperseries fields, that are suited to be equipped with derivations and composition laws. We show how to define embeddings on hyperseries fields that commute with transfinite sums and all…

Logic · Mathematics 2024-10-07 Vincent Bagayoko
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