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math.DS2023
On the Lambert problem with drag
Antonio J. Urena
The Lambert problem consists in connecting two given points in a given lapse of time under the gravitational influence of a fixed center. While this problem is very classical, we a…
math.DS2010
Dynamics of periodic second-order equations between an ordered pair of lower and upper solutions
Antonio J. Urena
We consider periodic second-order equations having an ordered pair of lower and upper solutions and show the existence of asymptotic trajectories heading towards the maximal and mi…