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| Hello, my problem is that I want to define in a model a boundary condition (BC) with zero gradient flux condition. I have several species in a table, and I want the first derivative for them to be zero. For a single species I dont have the... |
| Im just started to use Mathematica. I have been going through various demonstration files, and have so far didnt understand the language really I just discovered the UnitStep function. ![enter image description here][1] For me it looks like... |