Improving PINNs by leveraging basis expansions

vemuri c596e9c13a Adding notebook for wave equation		2 lat temu
README.md	2736e1729d Initial commit	2 lat temu
coupled_ode.ipynb	127f9cfcb0 Adding notebook for coupled differenitlal equation	2 lat temu
wave_equation_dxde.ipynb	c596e9c13a Adding notebook for wave equation	2 lat temu

BasisExpansionsPINNs

Improving PINNs by leveraging basis expansions