TY - JOUR
T1 - The Sufficient and Necessary Condition of Lagrange Stability of Quasi-Periodic Pendulum Type Equations
AU - Cong , Fuzhong
AU - Liang , Xin
AU - Han , Yuecai
JO - Communications in Mathematical Research 
VL - 1
SP - 76
EP - 84
PY - 2021
DA - 2021/05
SN - 26
DO - http://doi.org/
UR - https://global-sci.org/intro/article_detail/cmr/19179.html
KW - Lagrange stability, pendulum type equation, KAM theorem.
AB - <p style="text-align: justify;">The quasi-periodic pendulum type equations are considered. A sufficient
and necessary condition of Lagrange stability for this kind of equations is obtained.
The result obtained answers a problem proposed by Moser under the quasi-periodic
case.</p>