Recent content by urric

Hi Could you suggest me a good book on variational formulations? thanks

Hi, sorry if this isn't the correct forum. I'm trying freefem++ to solve some some problems with finite elements method, but in the documentation the following form of the variational equation is used: \displaystyle\int_{T_{h}} (\frac{{\partial u}}{{\partial x}}\frac{{\partial v}}{{\partial...

Hi, this is my first post here! I've been studying about topological insulators, but still I can't understand why this materials are called topological, I've read about topological analogy between the donut and the coffee mug and the smooth changes on the Hamiltonian, but I can't get the full...