An alternative approach to the n-dimensional small oscillations problem is presented. This method is based on the finding of n new independent constants of motion to get the n eigenfrequencies and the n normal coordinates of the problem. These constants of motion exist and may be explicitly constructed for any small oscillations problem. Three examples are presented. One of them involves solving a five-dimensional small oscillations problem whose solution is usually obtained by finding the roots of a quintic algebraic equation. The approach constructed here is especially suited to deal with high-dimensional problems. Applications to small oscillations as well as to high-degree algebraic equation solutions are discussed.

1.
H.
Goldstein
,
Classical Mechanics
(
Pearson
,
London
,
2001
).
2.
H. C.
Corben
and
P.
Stehle
,
Classical Mechanics
(
Dover Books on Physics
,
New York
,
1994
).
3.
A. L.
Fetter
and
J. D.
Walecka
,
Theoretical Mechanics of Particles and Continua
(
Dover
,
New York
,
2003
).
4.
J. W.
Donnelly
, “
Characteristic equation
,” <https://www.math.drexel.edu/~jwd25/LM_SPRING_07/lectures/lecture6B.html>
5.
A.
Cayley
,
Philos. Trans.
148
,
17
37
(
1858
).
6.
W. R.
Hamilton
,
Lectures on Quaternions
(
Hodges and Smith
,
Dublin
,
1853
).
7.
H. M.
Moya-Cessa
and
F.
Soto-Eguibar
,
Appl. Math. Inf. Sci.
5
,
361
366
(
2011
).
8.
See supplementary material at https://www.scitation.org/doi/suppl/10.1119/5.0106530 for the five-dimensional example.

Supplementary Material

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