Hello, I wrote a tensor extension library for multidimensional array representation and processing as a side project. It is similar to the Marray (https://savannah.nongnu.org/projects/marray/) and Tensor (http://savannah.nongnu.org/projects/tensor/) extensions by Jordi Burguet Castell, however, it should provide for more flexibility.
Hopefully, some of the maturity of GSL has rubbed off onto this module to make it useful for others as well. The code can be found here: https://github.com/zhtvk/tensor. Cheers, Viktor
