The global model is defined as

(15.6) |

where *i* is the residue index and *l* is the total number of residues used in the analysis.
This is the most complex of the four categories as both diffusion tensor parameters and model-free parameters of all selected residues are optimised simultaneously.
The dimensionality of the model
is much greater than the other categories and is equal to

dim | (15.7) |

where *k*_{i} is the number of model-free parameters for the residue *i* and is equal to
dim, the number six corresponds to the maximum dimensionality of
, and the number five corresponds to the maximum dimensionality of
.

The relax user manual (PDF), created 2019-03-08.