An essential actuality is that you can differentiate (obtain a spinoff) over a differentiable manifold, and This enables us to notice down any dilemma with intervening differential equations (like Newton’s gravitation theory or Einstein’s relativity principle). That may be why we simply call it «differentiable». It is actually obviously unattainable https://expressbookmark.com/story19323120/the-basic-principles-of-bos138