R.L. Lemmer

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All published works

Action	Title	Year	Authors
+ PDF Chat	Symmetry, Singularities and Integrability in Complex Dynamics III: Approximate Symmetries and Invariants	2001	P. G. L. Leach Sibusiso Moyo Spiros Cotsakis R.L. Lemmer
+ PDF Chat	Adiabatic invariants and mixmaster catastrophes	1998	Spiros Cotsakis R.L. Lemmer P. G. L. Leach
+	The lie analysis and solutions for a class of second-order non-linear ordinary differential equations	1994	R.L. Lemmer P. G. L. Leach

Common Coauthors

Coauthor	Papers Together
P. G. L. Leach	3
Spiros Cotsakis	2
Sibusiso Moyo	1

Commonly Cited References

Action	Title	Year	Authors	# of times referenced
+	On the polynomial first integrals of certain second-order differential equations	1982	F. Gascón F. Blanco E. Aguirre-Dabán	1
+	OSCILLATORY APPROACH TO THE SINGULAR POINT IN RELATIVISTIC COSMOLOGY	1971	V. A. Belinskiǐ E.M. LIFSHITZ I. M. Khalatnikov	1
+ PDF Chat	On Ellis' programme within fourth order gravity	1988	Hans‐Jürgen Schmidt	1
+	POWER-LAW TYPE SOLUTIONS OF FOURTH-ORDER GRAVITY FOR MULTIDIMENSIONAL BIANCHI I UNIVERSES	1991	H. Caprasse J. Demaret Karin Gatermann Herbert Melenk	1
+	LIE, a PC program for Lie analysis of differential equations	1993	A. K. Head	1
+	Approximate symmetry groups of inhomogeneous metrics	1977	Alan Spero Ralph Baierlein	1
+	Adiabatic invariance V: Multiple periods	1964	J. E. Littlewood	1
+	A numerical analysis of chaotic behaviour in Bianchi IX models	1990	A. B. Burd Nikola Burić George Ellis	1
+	An exact invariant for a class of time-dependent anharmonic oscillators with cubic anharmonicity	1981	P. G. L. Leach	1
+	Using EXCALC to study nondiagonal multidimensional spatially homogeneous cosmologies	1988	Yves De Rop J. Demaret	1
+	First integrals for the modified Emden equation <i>q</i>̈+α(<i>t</i>) <i>q</i>̇+<i>q</i> <i>n</i> =0	1985	P. G. L. Leach	1
+	Equivalent lagrangians and the solution of some classes of non-linear equations	1992	A. H. Kara F. M. Mahomed	1
+	Approximate symmetry groups of inhomogeneous metrics: Examples	1978	Alan Spero Ralph Baierlein	1
+	Schrödinger equation with time-dependent boundary conditions	1981	A. Munier J. R. Burgan Marc Feix E. Fijalkow	1
+	Chaos in the Einstein Equations	1981	John D. Barrow	1
+	The local instability of mixmaster dynamical systems	1991	Marek Szydłowski Andzej Łapeta	1
+	Exponential nonlocal symmetries and nonnormal reduction of order	2001	C. Géronimi Marc Feix P. G. L. Leach	1
+	Alternative descriptions of the discrete mixmaster universe	1983	Yves Elskens	1
+	Self-similar solutions of the generalized Emden-Fowler equation	1992	P. G. L. Leach Roy Maartens Sunil D. Maharaj	1
+ PDF Chat	Mixmaster spacetime, Geroch’s transformation, and constants of motion	1994	Boro Grubišić Vincent Moncrief	1
+	Symmetry Lie algebras of nth order ordinary differential equations	1990	F. M. Mahomed P. G. L. Leach	1
+ PDF Chat	Homogeneous solution of a nonlinear differential equation	1973	James L. Reid	1
+	Approximate Noether symmetries	1998	K. S. Govinder T. G. Heil T. Uzer	1
+	A direct procedure for deriving the invariants of certain non-linear dynamical systems	1989	P.V. Ranganathan	1
+ PDF Chat	Generalizations of Noether’s Theorem in Classical Mechanics	1981	W. Sarlet F. Cantrijn	1
+	On differentiable functions with isolated critical points	1969	Detlef Gromoll Wolfgang Meyer	1
+	Solutions of some classes of second order non-linear ordinary differential equations	1988	P.V. Ranganathan	1
+	Chaos in the Mixmaster Universe	1983	David Chernoff John D. Barrow	1
+	Non-oscillatory behaviour in vacuum Kaluza-Klein cosmologies	1985	J. Demaret Marc Henneaux Philippe Spindel	1
+	Symmetry, Singularities, and Integrability in Complex Dynamics II. Rescaling and Time-Translation in Two-Dimensional Systems	2000	P. G. L. Leach Spiros Cotsakis G P Flessas	1
+	Ergodic theory of the mixmaster universe in higher space-time dimensions. II	1987	Yves Eiskens	1
+	Elementary lie group analysis and ordinary differential equations	1999	N. Kh. Ibragimov	1
+	Symmetries of homogeneous cosmologies	2000	Spiros Cotsakis P. G. L. Leach Hara Pantazi	1
+ PDF Chat	Real Forms of the Complex Twisted N=2 Supersymmetric Toda Chain Hierarchy in Real N=1 and Twisted N=2 Superspaces	2000	P. G. L. Leach Spiros Cotsakis G P Flessas	1
+	Symmetries and Differential Equations	1989	George W. Bluman Sukeyuki Kumei	1
+ PDF Chat	The Bianchi IX (mixmaster) cosmological model is not integrable	1994	A. Latifi Micheline Musette Robert Conte	1
+	Approximate Transformation Groups and Deformations of Symmetry Lie Algebras	2024	Nail H. Ibragimov	1
+ PDF Chat	Nonlinear Differential Equations	1980	Alois Kutner Anna‐Margarete Sändig	1