Feature requests

[thoasm]

This issue is supposed to centralize all feature requests and list what features are currently worked upon.

If you have a request, please comment below with the use-case you have for it.

Currently, we are working on:

• [x] Reverse Cuthill-McKee (#500)
• [x] AMG (#528, #542, #695)
• [x] Induced Dimension Reduction (IDR) (#620)
• [x] Compressed Basis GMRES (https://github.com/ginkgo-project/ginkgo/pull/693, where krylov bases are stored in lower precision)
• [x] Computation of absolutes of matrices (#636)
• [x] Multi-GPU support (currently testing if it performs better than on a single GPU)
• [x] Incomplete Cholesky (#672)
• [x] Distributed executor with MPI (#907).
• [x] L1 norm (#798, #900)