In many important applications, what you have to solve is not just a single partial differential equation, but multiple partial differential equations coupled to each other. This is the case for many key PDEs including:
- Partial differential equation | 0, 2k, 45
- Differential equation | 0, 3k, 69
- Calculus | 17, 8k, 203
- Mathematics | 17, 28k, 633
- Ciro Santilli's Homepage | 262, 218k, 4k
- FEniCS Project | 233, 372, 1
- Lagrangian mechanics | 907, 2k, 19
- Lagrangian vs Hamiltonian | 105