Results 41 to 50 of about 37,514 (226)

The congruence subgroup property for $Aut F_2$: A group-theoretic proof of Asada's theorem

, 2011
The goal of this paper is to give a group-theoretic proof of the congruence subgroup property for $Aut(F_2)$, the group of automorphisms of a free group on two generators.
Bux, Kai-Uwe, Ershov, Mikhail, Rapinchuk, Andrei   +2 more
core   +2 more sources

Complex Structure of Kerr Geometry and Rotating `Photon Rocket' Solutions [PDF]

, 2003
In the frame of the Kerr-Schild approach, we obtain a generalization of the Kerr solution to a nonstationary case corresponding to a rotating source moving with arbitrary acceleration.
Burinskii, Alexander
core   +1 more source

On the geometry and behavior of n-body motions

International Journal of Mathematics and Mathematical Sciences, 2001
The kinematic separation of size, shape, and orientation of n-body systems is investigated together with specific issues concerning the dynamics of classical n-body motions.
Eldar Straume
doaj   +1 more source

A convex combinatorial property of compact sets in the plane and its roots in lattice theory [PDF]

Categories and General Algebraic Structures with Applications, 2019
K. Adaricheva and M. Bolat have recently proved that if $\,\mathcal U_0$ and $\,\mathcal U_1$ are circles in a triangle with vertices $A_0,A_1,A_2$, then there exist $j\in \{0,1,2\}$ and $k\in\{0,1\}$ such that $\,\mathcal U_{1-k}$ is included in the ...
Gábor Czédli, Árpád Kurusa
doaj   +1 more source

Rotation and pseudo-rotation

, 2005
Eigenvectors of stress-energy tensor (the source in Einstein's equations) form privileged bases in description of the corresponding space-times. When one or more of these vector fields are rotating (the property well determined in differential geometry),
A.P. Lightman, C.W. Misner, D. Kramer, D.M. Chitre, F. Fayos, H. Stephani, Héctor Vargas-Rodríguez, J. Horskÿ, N.V. Mitskievich, N.V. Mitskievich, N.V. Mitskievich, Nikolai V. Mitskievich   +11 more
core   +1 more source

Figure and its influence on problem solving strategies for a flat Geometry problem

Educação Matemática Debate, 2018
In this paper we aim to analyze how a figure proposed as part of the statement of a problem situation about flat Geometry can influence the resolution procedures presented by students entering a Mathematics degree course.
Cleusiane Vieira Silva, Weslley Igor da Cruz dos Santos   +1 more
doaj   +1 more source

Implementation of Ethnomathematics Strategy in Indonesian Traditional Games as Mathematics Learning Media

Journal of Innovation in Educational and Cultural Research, 2023
The learning strategy by associating cultural elements with mathematics is called ethnomathematics. The application of ethnomathematics in learning is very important in fostering a love for local culture which is currently almost abandoned due to ...
Zuhri Zuhri, Sinta Verawati Dewi, Jaka Wijaya Kusuma, Sri Rafiqoh, Isnaini Mahuda, Hamidah Hamidah   +5 more
doaj   +1 more source

Complex Kerr Geometry and Nonstationary Kerr Solutions

, 2003
In the frame of the Kerr-Schild approach, we consider the complex structure of Kerr geometry which is determined by a complex world line of a complex source. The real Kerr geometry is represented as a real slice of this complex structure.
A. Burinskii, A. Sen, A.Ya. Burinskii, A.Ya. Burinskii, A.Ya. Burinskii, A.Ya. Burinskii, A.Ya. Burinskii, A.Ya. Burinskii, Alexander Burinskii, B. Carter, B.S. De Witt, C.A. López, D. Cox, D. Ivanenko, D. Ivanenko, E. Newman, E.T. Newman, E.T. Newman, G.C. Debney, H. Ooguri, H. Ooguri, H. Ruse, O. Veblen, P.C. Vaidya, R. Penrose, R.P. Kerr, R.W. Lind, W. Israel, W. Kinnersley   +28 more
core   +1 more source

Enhancing Optoelectronic Properties in Phthalocyanine‐Based SURMOFs: Synthesis of ABAB Linkers by Avoiding Statistical Condensation with Tailored Building Blocks

Advanced Functional Materials, EarlyView.
A novel phthalocyanine (PC)‐based metal–organic framework (MOFs) is synthesized using ditopic PC linkers obtained through regioselective statistical condensation. The resulting MOF exhibits significant improvements in electronic absorption, thereby enhancing the material's performance in light harvesting and energy conversion.
Lukas S. Langer, Mareen Stahlberger, Xiaojing Liu, Yi Luo, Niklas E. Häußermann, Puja Singhvi, Yidong Liu, Olaf Fuhr, Martin Nieger, Lars Heinke, Thomas Heine, Christof Wöll, Stefan Bräse   +12 more
wiley   +1 more source

Jump into hopscotch: A game-based approach in enhancing students’ proficiency in triangle congruence

Davao Research Journal
Triangle congruence postulates is a crucial concept in Geometry. The integration of games into mathematics education is a significant development that can enhance student engagement and understanding.
Joylie Mae E Payot, Netchie Jane Tandog, Orville J Jr. Evardo   +2 more
doaj   +1 more source