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112 results
arxiv.org 📅 2014 📰 arXiv 📄 PDF
A General Equilibrium Theorem for the Economy of Giving
👤 W. P. Weijland

In [1] we presented a model for transactions when goods are given away in the expectation of a later settlement. In settings where people keep track of their social accounts we were able to redefine concepts like account balance, yield curve and the law of diminishing returns. In this paper we establish a general equil…

q-fin.GN
arxiv.org 📅 2007 📰 arXiv 📄 PDF
Quantum Mechanics: Bell and Quantum Entropy for the Classroom
👤 Philipp Pluch

In this article we are willing to give some first steps to quantum mechanics and a motivation of quantum mechanics and its interpretation for undergraduate students not from physics. After a short historical review in the development we discuss philosophical, physical and mathematical interpretation. We define local re…

physics.hist-ph physics.ed-ph
semanticscholar.org 📅 2019 📰 arXiv.org
Differential Similarity in Higher Dimensional Spaces: Theory and Applications
👤 L. T. McCarty

This paper presents an extension and an elaboration of the theory of differential similarity, which was originally proposed in arXiv:1401.2411 [cs.LG]. The goal is to develop an algorithm for clustering and coding that combines a geometric model with a probabilistic model in a principled way. For simplicity, the geomet…

arxiv.org 📅 2025 📰 arXiv 📄 PDF
Fast Directed $q$-Analysis for Brain Graphs
👤 Felix Windisch; Florian Unger

Recent innovations in reconstructing large scale, full-precision, neuron-synapse-scale connectomes demand subsequent improvements to graph analysis methods to keep up with the growing complexity and size of the data. One such tool is the recently introduced directed $q$-analysis. We present numerous improvements, theor…

q-bio.QM math.AT
arxiv.org 📅 2025 📰 arXiv 📄 PDF
Autonomous motion in changing environment, fibrations and reaction mechanisms
👤 Michael Farber; Stefan Kurz; Mathias Pillin

In this paper we develop further the formalism of fibrations of configuration spaces as a tool for modelling motion of autonomous systems in variable environments. We analyse the situations when the external conditions may change during the motion of the system and analyse two possibilities: (a) when the behaviour of t…

math.AT math.OC
arxiv.org 📅 2001 📰 arXiv 📄 PDF
Bures geometry of the three-level quantum systems. II
👤 Paul B. Slater

For the eight-dimensional Riemannian manifold comprised by the three-level quantum systems endowed with the Bures metric, we numerically approximate the integrals over the manifold of several functions of the curvature and of its (anti-)self-dual parts. The motivation for pursuing this research is to elaborate upon the…

math-ph math.DG physics.comp-ph quant-ph
arxiv.org 📅 2022 📰 arXiv 📄 PDF
Mechanistic insights into water autoionization
👤 Ling Liu; Yingqi Tian; Chungen Liu

Water autoionization plays a critical role in determining pH and properties of various chemical and biological processes occurring in the water mediated environment. The strikingly unsymmetrical potential energy surface of the dissociation process poses a great challenge to the mechanistic study. Here, we demonstrate t…

physics.chem-ph physics.comp-ph
DOI: 10.1103/PhysRevLett.131.158001
arxiv.org 📅 2013 📰 arXiv 📄 PDF
The Jacobi identity for graded-commutative variational Schouten bracket revisited
👤 Arthemy V. Kiselev

This short note contains an explicit proof of the Jacobi identity for variational Schouten bracket in $Z_2$-graded commutative setup. For the reasoning to be rigorous, it refers to the product bundle geometry of iterated variations (see arXiv:1312.1262 [math-ph]); no ad hoc regularizations occur anywhere in this theory…

math-ph hep-th math.DG nlin.SI
DOI: 10.1134/S1547477114070243
arxiv.org 📅 2002 📰 arXiv 📄 PDF
Optimal quantum pumps have a vanishing transmission coefficient
👤 A. Alekseev

In a recent Letter, Avron et. al (math-ph/0105011) introduced a notion of optimal quantum pumps. These are adiabatic quantum pumps which work without dissipation. In particular, they produce neither entropy nor noise. In the present Comment we show that in the absence of magnetic field optimal quantum pumps always have…

cond-mat.mes-hall
arxiv.org 📅 2009 📰 arXiv 📄 PDF
Anomalous pH-gradient in Ampholyte Solution
👤 L. V. Sakharova; V. A. Vladimirov; M. Yu. Zhukov

A mathematical model describing a steady pH-gradient in the solution of ampholytes in water has been studied with the use of analytical, asymptotic, and numerical methods. We show that at the large values of an electric current a concentration distribution takes the form of a piecewise constant function that is drastic…

physics.chem-ph
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