| from .cartan_type import CartanType | |
| def CartanMatrix(ct): | |
| """Access the Cartan matrix of a specific Lie algebra | |
| Examples | |
| ======== | |
| >>> from sympy.liealgebras.cartan_matrix import CartanMatrix | |
| >>> CartanMatrix("A2") | |
| Matrix([ | |
| [ 2, -1], | |
| [-1, 2]]) | |
| >>> CartanMatrix(['C', 3]) | |
| Matrix([ | |
| [ 2, -1, 0], | |
| [-1, 2, -1], | |
| [ 0, -2, 2]]) | |
| This method works by returning the Cartan matrix | |
| which corresponds to Cartan type t. | |
| """ | |
| return CartanType(ct).cartan_matrix() | |