- #1
stanley.st
- 31
- 0
Hello !
When I'm reading something about differential equations everywhere it's about open sets. For example when we define special kind of equation
[tex]x'=f(t,x)\,;\;f:\Omega\subset\mathbb{R}\times\mathbb{R}\to\mathbb{R}[/tex]
Omega is open. Why Omega must be open? Thanks
When I'm reading something about differential equations everywhere it's about open sets. For example when we define special kind of equation
[tex]x'=f(t,x)\,;\;f:\Omega\subset\mathbb{R}\times\mathbb{R}\to\mathbb{R}[/tex]
Omega is open. Why Omega must be open? Thanks