I can see that invertible matrices are a differentiable manifold however I don't know how to show that something is not a differentiable manifold so easily.
Is it ever the case that singular matrices form a differentiable manifold?
I can see that invertible matrices are a differentiable manifold however I don't know how to show that something is not a differentiable manifold so easily.
Is it ever the case that singular matrices form a differentiable manifold?