- #1

- 708

- 20

[tex]R^{\text{T}}R=I[/tex],

that could be written in form

[tex]\sum_i R_{i,j}R_{i,k}=\delta_{j,k}[/tex].

For this real algebra ##SO(N)## there is ##n=\frac{N(N-1)}{2}## real parameters. Why this is the case when unitary matrix is not symmetric?