[eigen] simplex operations in Tensor package

[Mathieu Dutour <mathieu.dutour@xxxxxxxxx>]

Hi,

would it be possible to have some basic arithmetic operation

in the tensor packages such as

RetTensor = alpha*Tens1 + beta*Tens2;

with say RetTensor, Tens1, and Tens2 of the

form Eigen::Tensor<double,3> ?

Thank you very much in advance.

  Mathieu