Expression of the multiple replication of a matrix or vector.
| MatrixType | the type of the object we are replicating | 
| RowFactor | number of repetitions at compile time along the vertical direction, can be Dynamic. | 
| ColFactor | number of repetitions at compile time along the horizontal direction, can be Dynamic. | 
This class represents an expression of the multiple replication of a matrix or vector. It is the return type of DenseBase::replicate() and most of the time this is the only way it is used.
Inherits internal::dense_xpr_base::type.
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    https://eigen.tuxfamily.org/dox/classEigen_1_1Replicate.html