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The existential theory of equations with rational constraints in free groups is PSPACE-complete
(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-11-01)
It is well-known that the existential theory of equations in free groups is decidable. This is a celebrated result of Makanin which was published 1982. Makanin did not discuss complexity issues, but later it was shown that ...
ROOT PROBLEM FOR CONVENIENT MAPS
(JULIUSZ SCHAUDER CTR NONLINEAR STUDIESTORUN, 2010)
In this paper we study when the minimal number of roots of the so-called convenient maps horn two-dimensional CW complexes into closed surfaces is zero We present several necessary and sufficient conditions for such a map ...
Free groups in quaternion algebras
(Amsterdam, 2013-04-01)
In Juriaans et al. (2009) [9] we constructed pairs of units u,v in Z-orders of a quaternion algebra over View the MathML source, d a positive and square free integer with View the MathML source, such that 〈un,vn〉 is free ...
Möbius fluid dynamics on the unitary groups
(Springer, 2022)
Trade Creation and Diversion Effects under the Free Trade Agreement between Peru and the United States: A Gravitational Analysis
(Pontificia Universidad Católica del Perú, 2021)
PREDICTION OF FAT-FREE MASS BY BIOELECTRICAL IMPEDANCE ANALYSIS IN OLDER ADULTS FROM DEVELOPING COUNTRIES: A CROSS-VALIDATION STUDY USING THE DEUTERIUM DILUTION METHOD
(SPRINGER FRANCE, 2010)
Objective: Several limitations of published bioelectrical impedance analysis (BIA) equations have been reported. The aims were to develop in a multiethnic, elderly population a new prediction equation and cross-validate ...
Trade Creation and Diversion Effects under the Free Trade Agreement between Peru and the United States: A Gravitational Analysis
(Pontificia Universidad Católica del PerúPE, 2022)
A Skyrme-like model with an exact BPS bound
(SpringerHeidelberg, 2013-09)
We propose a new Skyrme-like model with fields taking values on the sphere S3 or, equivalently, on the group SU(2). The action of the model contains a quadratic kinetic term plus a quartic term which is the same as that ...
Non-Riemannian geometry, Born–Infeld models and trace free gravitational equations
(Elsevier B.V., 2017-08)
Non-Riemannian generalization of the standard Born–Infeld (BI) Lagrangian is introduced and analyzed from a theory of gravitation with dynamical torsion field. The field equations derived from the proposed action lead to ...