scholarly journals Noether symmetry and the Hojman conserved quantity of the Kepler equation

2010 ◽  
Vol 59 (2) ◽  
pp. 716
Author(s):  
Gu Shu-Long ◽  
Zhang Hong-Bin
Keyword(s):  
Conserved Quantity ◽  
Noether Symmetry ◽  
Kepler Equation ◽  
Hojman Conserved Quantity

Hojman conserved quantity deduced by weak Noether symmetry for Lagrange systems

2008 ◽  
Vol 17 (2) ◽  
pp. 390-393 ◽  
Author(s):  
Xie Jia-Fang ◽  
Gang Tie-Qiang ◽  
Mei Feng-Xiang
Keyword(s):  
Conserved Quantity ◽  
Noether Symmetry ◽  
Hojman Conserved Quantity

Lie Symmetry and Approximate Hojman Conserved Quantity of Lagrange Equations for a Weakly Nonholonomic System

2013 ◽  
Vol 30 (1) ◽  
pp. 21-27 ◽  
Author(s):  
Y.-L. Han ◽  
X.-X. Wang ◽  
M.-L. Zhang ◽  
L.-Q. Jia
Keyword(s):  
Nonholonomic System ◽  
Equations Of Motion ◽  
Lie Symmetry ◽  
Conserved Quantity ◽  
Holonomic System ◽  
Lagrange Equations ◽  
Definition Of ◽  
Weakly Nonholonomic System ◽  
Infinitesimal Transformations ◽  
Hojman Conserved Quantity

ABSTRACTThe Lie symmetry and Hojman conserved quantity of Lagrange equations for a weakly nonholonomic system and its first-degree approximate holonomic system are studied. The differential equations of motion for the system are established. Under the special infinitesimal transformations of group in which the time is invariable, the definition of the Lie symmetry for the weakly nonholonomic system and its first-degree approximate holonomic system are given, and the exact and approximate Hojman conserved quantities deduced directly from the Lie symmetry are obtained. Finally, an example is given to study the exact and approximate Hojman conserved quantity for the system.

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