Hi everyone:

I'm looking forward to a wonderful matrix class library!
Does someone like to introduce a to me?
It should satisfy the following demands:
1. Open Source.
2. Efficient.
3. Support basic matrix operations: +, -, *, transpose, inverse,
convolution.
4. Support multi-dimension matrix, e.g. for a 24-bit bitmap, if I
put it into the matrix, it should be a 3-dimension matrix: height,
width, the byte number each pixel.
5. Optional, support sparse matrix, and its related oprations.