I think if you build Pytorch from source and you don’t provide MKL, then Pytorch will rely on Eigen as one of its submodules 13. That said, you do not even need a linear algebra library on your system for Pytorch to compile
In the setup.py 30 you will find
#   BLAS
#     BLAS to be used by Caffe2. Can be MKL, Eigen, ATLAS, or OpenBLAS. If set
#     then the build will fail if the requested BLAS is not found, otherwise
#     the BLAS will be chosen based on what is found on your system.

And thanks for translating the characters for us, I appreciate that a lot