The set \(SL_2(\mathbb {R})\) of \(2\times 2\) matrices with determinant 1 can be viewed as a subset of \(\mathbb {R}^4\) by choosing an ordering of the matrix entries. Show that this set is a submanifold of \(\mathbb {R}^4\) and compute the tangent space at the identity matrix.
Question
Math 6510 • Differentiable Manifolds
Winter 2007 • Question 6