Results 31 to 40 of about 441,191 (277)
Solutions to the cosmological constant problems [PDF]
, 2001 We critically review several recent approaches to solving the two cosmological constant problems. The "old" problem is the discrepancy between the observed value of $\Lambda$ and the large values suggested by particle physics models.
A. J. Riess +53 more
core +3 more sources
Localized intersection of currents and the Lefschetz coincidence point theorem
, 2015 We introduce the notion of a Thom class of a current and define the localized intersection of currents. In particular we consider the situation where we have a smooth map of manifolds and study localized intersections of the source manifold and currents ...
Bisi, Cinzia +3 more
core +1 more source
On almost coincidence points in generalized convex spaces
Fixed Point Theory and Applications, 2006 We prove an almost coincidence point theorem in generalized convex spaces. As an application, we derive a result on the existence of a maximal element and an almost coincidence point theorem in hyperconvex spaces.
Zoran D. Mitrović
doaj +2 more sources
Geometric and homotopy theoretic methods in Nielsen coincidence theory
, 2006 In classical fixed point and coincidence theory the notion of Nielsen numbers has proved to be extremely fruitful. Here we extend it to pairs (f_1, f_2) of maps between manifolds of arbitrary dimensions. This leads to estimates of the minimum numbers MCC(
Koschorke, Ulrich
core +4 more sources
Nonstabilized Nielsen coincidence invariants and Hopf--Ganea homomorphisms
, 2006 In classical fixed point and coincidence theory the notion of Nielsen numbers has proved to be extremely fruitful. We extend it to pairs (f_1,f_2) of maps between manifolds of arbitrary dimensions, using nonstabilized normal bordism theory as our main ...
Bogatyĭ +13 more
core +3 more sources
Coincidence points of mappings in Banach spaces [PDF]
Fixed Point Theory, 2020 In this article we prove an existence theorem for coincidence points of mappings in Banach spaces. This theorem generalizes the Kantorovich fixed point theorem.
openaire +2 more sources
On Approximate Coincidence Point Properties and Their Applications to Fixed Point Theory
Journal of Applied Mathematics, 2012 We first establish some existence results concerning approximate coincidence point properties and approximate fixed point properties for various types of nonlinear contractive maps in the setting of cone metric spaces and general metric spaces.
Wei-Shih Du
doaj +1 more source
New coincidence and common fixed point theorems
Applied General Topology, 2009 In this paper, we obtain some extensions and a generalization of a remarkable fixed point theorem of Proinov. Indeed, we obtain some coincidence and fixed point theorems for asymptotically regular non-self and self-maps without requiring continuity and ...
S.L. Singh +2 more
doaj +1 more source
The dimensionless age of the Universe: a riddle for our time
, 2016 We present the interesting coincidence of cosmology and astrophysics that points toward a dimensionless age of the universe H_0*t_0 that is close to one.
Avelino, Arturo, Kirshner, Robert P.
core +1 more source
Coincident-point rigidity in normed planes
Ars Mathematica Contemporanea, 2023 A bar-joint framework $(G,p)$ is the combination of a graph $G$ and a map $p$ assigning positions, in some space, to the vertices of $G$. The framework is rigid if every edge-length-preserving continuous motion of the vertices arises from an isometry of the space.
Dewar, Sean +2 more
openaire +4 more sources