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Nonlinear Randomized Urn Models: a Stochastic Approximation Viewpoint
This paper extends the link between stochastic approximation (SA) theory and randomized urn models developed in Laruelle, Pag{è}s (2013), and their applications to clinical trials introduced in Bai, HU (1999,2005) and Bai, Hu, Shen (2002). We no longer assume that the drawing rule is uniform among the balls of the urn (which contains d colors), but can be reinforced by a function f. This is a way to model risk aversion. Firstly, by considering that f is concave or convex and by reformulating the dynamics of the urn composition as an SA algorithm with remainder, we derive the a.s. convergence and the asymptotic normality (Central Limit Theorem, CLT) of the normalized procedure by calling upon the so-called ODE and SDE methods. An in-depth analysis of the case d=2 exhibits two different behaviors: A single equilibrium point when f is concave, and when f is convex, a transition phase from a single attracting equilibrium to a system with two attracting and one repulsive equilibrium points. The last setting is solved using results on non-convergence toward noisy and noiseless "traps" in order to deduce the a.s. convergence toward one of the attracting points. Secondly, the special case of a Polya urn (when the addition rule is the identity matrix) is analyzed, still using result from SA theory about "traps". Finally, these results are applied to a function with regular variation and to an optimal asset allocation in Finance.
Evaluation and Improvement of Laruelle-Widgrén Inverse Banzhaf Approximation
The goal of this paper is to critically evaluate a heuristic algorithm for the Inverse Banzhaf Index problem by Laruelle and Widgrén. Few qualitative results are known about the approximation quality of the heuristics for this problem. The intuition behind the operation of this approximation algorithm is analysed and evaluated. We found that the algorithm can not handle general inputs well, and often fails to improve inputs. It is also shown to diverge after only tens of iterations. We present three alternative extensions of the algorithm that do not alter the complexity but can result in up to a factor 6.5 improvement in solution quality.
The Quantum Revolution in Philosophy (Book Review)
In this thought-provoking book, Richard Healey proposes a new interpretation of quantum theory inspired by pragmatist philosophy. Healey puts forward the interpretation as an alternative to realist quantum theories on the one hand such as Bohmian mechanics, spontaneous collapse theories, and many-worlds interpretations, which are different proposals for describing what the quantum world is like and what the basic laws of physics are, and non-realist interpretations on the other hand such as quantum Bayesianism, which proposes to understand quantum theory as describing agents' subjective epistemic states. The central idea of Healey's proposal is to understand quantum theory as providing not a description of the physical world but a set of authoritative and objectively correct prescriptions about how agents should act. The book provides a detailed development and defense of that idea, and it contains interesting discussions about a wide range of philosophical issues such as representation, probability, explanation, causation, objectivity, meaning, and fundamentality. Healey's project is at the intersection of physics and philosophy. The book is divided into two parts. Part I of the book discusses the foundational questions in quantum theory from the perspective of the prescriptive interpretation. In Part II, Healey discusses the philosophical implications of the view. Both parts are written in a way that is largely accessible to non-specialists. In this brief book review, I will focus on two questions: (1) How does Healey's idea work? (2) What reasons are there to believe in it?
The roads to non-individuals (and how not to read their maps)
Ever since its beginnings, standard quantum mechanics has been associated with a metaphysical view according to which the theory deals with non-individual objects, i.e., objects deprived of individuality in some sense of the term. We shall examine the grounds of the claim according to which quantum mechanics is so closely connected with a metaphysics of non-individuals. In particular, we discuss the attempts to learn the required `metaphysical lessons' required by quantum mechanics coming from four distinct roads: from the formalism of the theory, treating separately the case of the physics and the underlying logic; from the ontology of the theory, understood as the furniture of the world according to the theory; and, at last, we analyze whether a metaphysics of non-individuals is indispensable from a purely metaphysical point of view. We argue that neither non-individuality nor individuality is not to be found imposed on us in any of these levels so that it should be seen as a metaphysical addition to the theory, rather than as a lesson from it.
Stochastic Approximation with Averaging Innovation Applied to Finance
The aim of the paper is to establish a convergence theorem for multi-dimensional stochastic approximation when the "innovations" satisfy some "light" averaging properties in the presence of a pathwise Lyapunov function. These averaging assumptions allow us to unify apparently remote frameworks where the innovations are simulated (possibly deterministic like in Quasi-Monte Carlo simulation) or exogenous (like market data) with ergodic properties. We propose several fields of applications and illustrate our results on five examples mainly motivated by Finance.
String theory, Einstein, and the identity of physics: Theory assessment in absence of the empirical
String theorists are certain that they are practicing physicists. Yet, some of their recent critics deny this. This paper argues that this conflict is really about who holds authority in making rational judgment in theoretical physics. At bottom, the conflict centers on the question: who is a proper physicist? To illustrate and understand the differing opinions about proper practice and identity, we discuss different appreciations of epistemic virtues and explanation among string theorists and their critics, and how these have been sourced in accounts of Einstein's biography. Just as Einstein is claimed by both sides, historiography offers examples of both successful and unsuccessful non-empirical science. History of science also teaches that times of conflict are often times of innovation, in which novel scholarly identities may come into being. At the same time, since the contributions of Thomas Kuhn historians have developed a critical attitude towards formal attempts and methodological recipes for epistemic demarcation and justification of scientific practice. These are now, however, being considered in the debate on non-empirical physics.
Optimal split of orders across liquidity pools: a stochastic algorithm approach
Evolutions of the trading landscape lead to the capability to exchange the same financial instrument on different venues. Because of liquidity issues, the trading firms split large orders across several trading destinations to optimize their execution. To solve this problem we devised two stochastic recursive learning procedures which adjust the proportions of the order to be sent to the different venues, one based on an optimization principle, the other on some reinforcement ideas. Both procedures are investigated from a theoretical point of view: we prove a.s. convergence of the optimization algorithm under some light ergodic (or "averaging") assumption on the input data process. No Markov property is needed. When the inputs are i.i.d. we show that the convergence rate is ruled by a Central Limit Theorem. Finally, the mutual performances of both algorithms are compared on simulated and real data with respect to an "oracle" strategy devised by an "insider" who knows a priori the executed quantities by every venues.
Optimal posting price of limit orders: learning by trading
Considering that a trader or a trading algorithm interacting with markets during continuous auctions can be modeled by an iterating procedure adjusting the price at which he posts orders at a given rhythm, this paper proposes a procedure minimizing his costs. We prove the a.s. convergence of the algorithm under assumptions on the cost function and give some practical criteria on model parameters to ensure that the conditions to use the algorithm are fulfilled (using notably the co-monotony principle). We illustrate our results with numerical experiments on both simulated data and using a financial market dataset.
Randomized Urn Models revisited using Stochastic Approximation
This paper presents the link between stochastic approximation and clinical trials based on randomized urn models investigated in Bai and Hu (1999,2005) and Bai, Hu and Shen (2002). We reformulate the dynamics of both the urn composition and the assigned treatments as standard stochastic approximation (SA) algorithms with remainder. Then, we derive the a.s. convergence and the asymptotic normality (CLT) of the normalized procedure under less stringent assumptions by calling upon the ODE and SDE methods. As a second step, we investigate a more involved family of models, known as multi-arm clinical trials, where the urn updating depends on the past performances of the treatments. By increasing the dimension of the state vector, our SA approach provides this time a new asymptotic normality result.
A Novel Non-population-based Meta-heuristic Optimizer Inspired by the Philosophy of Yi Jing
Drawing inspiration from the philosophy of Yi Jing, Yin-Yang pair optimization (YYPO) has been shown to achieve competitive performance in single objective optimizations. Besides, it has the advantage of low time complexity when comparing to other population-based optimization. As a conceptual extension of YYPO, we proposed the novel Yi optimization (YI) algorithm as one of the best non-population-based optimizer. Incorporating both the harmony and reversal concept of Yi Jing, we replace the Yin-Yang pair with a Yi-point, in which we utilize the Levy flight to update the solution and balance both the effort of the exploration and the exploitation in the optimization process. As a conceptual prototype, we examine YI with IEEE CEC 2017 benchmark and compare its performance with a Levy flight-based optimizer CV1.0, the state-of-the-art dynamical Yin-Yang pair optimization in YYPO family and a few classical optimizers. According to the experimental results, YI shows highly competitive performance while keeping the low time complexity. Hence, the results of this work have implications for enhancing meta-heuristic optimizer using the philosophy of Yi Jing, which deserves research attention.
Non-philosophy and Laurelle's From Decision to Heresy
<p>With Principles of Non-Philosophy, Laruelle elaborates on the concepts and methods of non-philosophy with even greater attention. Yet he carries out this elaboration without much mention or textual analysis of the history of philosophy one sees in Philosophies of Difference. This is in part because Principles of Non-Philosophy aims to elaborate the very project it is detailing without any distance between that elaboration and the project itself. It is wildly constructivist and undeniably rooted in the history of the European philosophical tradition.</p>
biocompibens/cellmodelling: cellModelling-v1.0.0-submission
<p>SET and examples shown in the paper 'Unraveling spatial cellular pattern by computational tissue shuffling' (E. Laruelle, N. Spassky, A.Genovesio)</p>
Intention of non-action: on performative structure of subjectivity
<p>Article is devoted to ethical aspect of a performativity which usually remains beyond the scope of esthetic, political, linguistic aspects. In modern performance studies are usually combined the private and exact entered by Ostin definition of a performativity as the word making action, and widespread Marxist idea of the critical, changing the world theory potential. In article the main rate becomes on the heterodox reading of a performativity following criticism of violence of metaphysics of Levinas. If the theory is output from ethics, then the performativityt is thought as radical passivity of the theory. In that case, crucial importance for conceptual model of the subject is gained by not epistemological, but ethical measurement, namely ethics of a categorical imperative. The categorical imperative is arranged as a performatory contradiction between desire and a will, it fixes a situation of a gap, an akrasia, otherwise, of the decision. Two modern interpretations of value of a concept of the subject of the decision are given in article. One of them - positive, belongs Badiou, it is the subject of fidelity to an event. It will be coordinated with the subject of practical mind of Kant as it is supported by the pure and formal movement of will. However this model, according to Meillassoux, can be considered transitional as the exclusivity of the decision undermines a correlation circle. The criticism of the Philosophical Decision as distributions of transcendental and empirical functions, offered by Laruelle appears really fresh course. Non-philosophy thinks of itself as the only performatory theory because it registers this initial decision and refuses to go on a speculative circular way of philosophizing. The main problem connected with non - philosophy, consists that its performativity remains rather declarative, conditions of a solution of the problem of an akrasia, a gap between desirable and possible are not clear.</p> <p> </p>
Praise the Sun: The Metaphysics of Dark Souls from the First Flame to the End of Fire
<p>Through the philosophies of Martin Heidegger, Jacques Derrida, and François Laruelle, this paper deconstructs the metaphysics of the sun that undergirds the worlds of the three <em>Dark Souls </em>games developed by FromSoftware, while also identifying the internal critique of this metaphysics that the <em>Dark Souls </em>games successively elaborate. Indeed, as inversions of the western fantasy model, the three <em>Dark Souls </em>games also labour to invert western <em>philosophy</em>, striking at the heart of Platonic idealism and its variations throughout history.</p>
CCXXI.?Interaction of alkali alkyl sulphates and alkali nitrites: theories of the formation of aliphatic nitro?compounds
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In Search of a Distant Light: Metaphysical Speculation and the Horror of Decision in Elden Ring and Elden Ring: Shadow of the Erdtree
<p>In <em>Elden Ring</em>, the Shabriri Grape serves as a focal point for the metaphysical speculation that has become distinctive of the studio's oeuvre under the tenure of game director and now company president Hidetaka Miyazaki. As the player-character blindly pulls on the threads of Queen Marika's Golden Order, woven as they are throughout the Lands Between, they find themselves inducted into a metaphysical investigation. <em>Elden Ring</em> toys with questions of ontology and subjectivity that challenge the idealist branch of the Western philosophical canon, and in so doing introduces a ludic torsion that requires its players to come to terms with notions of the real and its organization that go back to the beginning of recorded critical inquiry. <em>Elden Ring</em>, redoubling the stylistics of its forebears, is distinctly hermetic in its narrative construction, and consequently it requires of its players a hermeneutic sensibility, a willingness to engage in the interpretation of the textual traces scattered throughout its gameworld, traces such as those which accompany the Shabriri Grape. To follow the guidance of this "yellowing, oozing eyeball," to set off in pursuit of the "distant light" it reveals, the player-character must go to the limits of their knowledge, indeed to the very limit of knowledge as such, to the original scission or abyss from which the world of <em>Elden Ring</em> was born.</p>
FORMING COLLECTIVE IDENTITY AS THE FOUNDATION FOR CENTRAL ASIAN INTEGRATION
<div>This article explores how forming a collective Central Asian identity can serve</div> <div>as a foundation for meaningful regional integration. While geopolitical challenges and the legacy</div> <div>of Soviet rule have long hindered cooperation among the five republics, recent developments—</div> <div>particularly Uzbekistan’s shift toward regionalism since 2016—have renewed attention on</div> <div>shared cultural and historical ties. The paper argues that a common identity is not merely</div> <div>symbolic, but a practical step toward stronger political, economic, and social bonds. Drawing on</div> <div>constructivist and postcolonial approaches, it examines the opportunities and obstacles involved</div> <div>in building this identity, including nationalist narratives, external influence, and historical</div> <div>divisions. Ultimately, the article suggests that a shared regional identity could help Central Asian</div> <div>states strengthen internal unity, manage cross-border issues more effectively, and assert greater</div> <div>autonomy in the global arena.</div>
The Formal Genesis of Philosophy: Theory-Internal Meaning, Conceptual Abstraction, and the Interface between Philosophy and Non-Philosophy
<p>This paper proposes a systematic reconstruction of philosophical theory construction. It argues that the essence of philosophy does not lie in describing reality but in formally generating the conditions under which reality becomes intelligible. Philosophical theory construction is defined as the act of assigning to any conceptual or empirical content an abstract, theory-internal form endowed with meaning specific to that theoretical context. This process constitutes an interface between philosophy and non-philosophy: within philosophy, the form creates meaning; beyond philosophy, it provides a structure through which the empirical world can be interpreted. The paper develops a four-layer model—formal attribution, theory-internal meaning, interface mediation, and formal narrative reasoning—and situates it within the history of philosophical thought from Kant to Badiou. It concludes that philosophy’s originality resides in its capacity to construct formal truth rather than empirical truth, thereby offering a model for future interdisciplinary and computational applications of philosophical method.</p>
LiBRI Journal - The Relation of Merleau-ponty and Blanchot to Derrida
<p>ABSTRACT</p> <p>In this paper I examine the negative phenomenologies of Merleau-Ponty and Blanchot. Negative phenomenologies repress difference as the transcendental and the empirical are repetitions of the same through iterability. I argue that a negative phenomenology or a reversal of phenomenology repeats it rather than managing to escape from it. This is because it still proceeds within its metaphysical vocabulary and ontological structure. Thus, Merleau-Ponty and Blanchot, in inverting and reversing phenomenology, only repeat it by borrowing entirely from its metaphysical vocabulary and structure. Derrida’s phenomenology in place, is a meta-phenomenology in discovering the origin of phenomenology as difference, or the difference between philosophy and non-philosophy, transcendental and empirical. Derrida discovers the condition of possibility for phenomenology as quasi-transcendental, or the interval between the transcendental and empirical which conditions phenomenology in its entirety. The transcendental and empirical are paradoxically identical and non-identical because the difference translates into sameness. </p>
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