Some authors define the modular group to be PSL(2, Z), and still others define the modular group to be the larger group SL(2, Z). Some mathematical relations ...
由 K CONRAD 著作 · 被引用 16 次 — We will give two proofs that G = SL2(Z), one algebraic and the other geometric. For the algebraic proof, we start by writing down the effect of S and Tn on a ...
2022年4月6日 — The group SL(2,Z) is the group of two-by-two matrices with integer entries and determinant one. This is a very simple definition. Yet its ...