Results 71 to 80 of about 11,066 (183)
Some fixed point theorems for discontinuous mappings [PDF]
This paper provides a fixed point theorem à la Schauder, where the mappings considered are possibly discontinuous. Our main result generalizes and unifies several well-known results.Schauder fixed point theorem, Brouwer fixed point theorem, discontinuity.
Philippe Bich
core
International Economic Review, Volume 66, Issue 4, Page 1693-1712, October 2025.ABSTRACT We examine the feedback loop between shortages and consumer stockpiling. The expectation of shortages induces consumers to stockpile, which amplifies the shortages they experience, which further encourages stockpiling. We show that, when aggregate supply is insufficient to meet aggregate demand and prices cannot adjust to clear the market ...
Tilman Klumpp, Xuejuan Su
wiley +1 more source
Brouwer's Fixed Point Theorem with Isolated Fixed Points and His Fan Theorem
ISRN Computational Mathematics, 2012 We show that Brouwer’s fixed point theorem with isolated fixed points is equivalent to Brouwer’s fan theorem.
openaire +1 more source
Journal of Applied Econometrics, Volume 40, Issue 6, Page 608-626, September/October 2025.ABSTRACT This paper introduces a generalized model of peer effects for binary outcomes, based on a network game that accounts for strategic complementarity (influence of the number of peers that select the same action) and conformity to social norms (penalizing deviations from the average peers' action).
Mathieu Lambotte
wiley +1 more source
Approximate Fixed Point Theorems [PDF]
Under some weakenings of the condition of the well-known fixed point theorems of Brouwer, Kakutani and Banach the existence of approximate fixed points turns out to be still guaranteed.
Brânzei, R., Tijs, S.H., Torre, A.
core +1 more source
Constant Rank Bimatrix Games are PPAD-hard
, 2014 The rank of a bimatrix game (A,B) is defined as rank(A+B). Computing a Nash equilibrium (NE) of a rank-$0$, i.e., zero-sum game is equivalent to linear programming (von Neumann'28, Dantzig'51). In 2005, Kannan and Theobald gave an FPTAS for constant rank
Adler I. +5 more
core +1 more source
Contribution to a public good with altruistic preferences
Canadian Journal of Economics/Revue canadienne d'économique, Volume 58, Issue 3, Page 1092-1122, August 2025.Abstract This paper presents a model of private provision of a public good where individuals have altruistic preferences and care about the private and public good consumption of the other members of their group. I compare the Nash level of the public good to the benchmark level of provision by a social planner who aggregates the preferences of group ...
Anwesha Banerjee
wiley +1 more source
A note on matrices mapping a positive vector onto its element-wise inverse
, 2017 For any primitive matrix $M\in\mathbb{R}^{n\times n}$ with positive diagonal entries, we prove the existence and uniqueness of a positive vector $\mathbf{x}=(x_1,\dots,x_n)^t$ such that $M\mathbf{x}=(\frac{1}{x_1},\dots,\frac{1}{x_n})^t$.
Labbé, Sébastien
core +1 more source
One‐Shot Method for Computing Generalized Winding Numbers
Computer Graphics Forum, Volume 44, Issue 5, August 2025.Abstract The generalized winding number is an essential part of the geometry processing toolkit, allowing to quantify how much a given point is inside a surface, even when the surface has boundaries and noise. We propose a new universal method to compute a generalized winding number, based only on the surface boundary and the intersections of a single ...
C. Martens, M. Bessmeltsev
wiley +1 more source
Global stability of a vaccination model with immigration
Electronic Journal of Differential Equations, 2015 We study an SVIR model of disease transmission with immigration into all four classes. Vaccinated individuals may only receive partial immunity to the disease, giving a leaky vaccine.
Sarah Henshaw, C. Connell McCluskey
doaj