A majority Americans believe in UFOs and just under half think extraterrestrial beings have visited Earth, according to a 2015 poll of about 1,000 adults in the US. Though people in the US can barely ...

Solving dynamic models with inequality constraints poses a challenging problem for two major reasons: dynamic programming techniques are reliable but often slow, whereas Euler equation-based methods ...

This is a preview. Log in through your library . Abstract An original method of integration is described for quasi-linear hyperbolic equations in three independent variables. The solution is ...