Loglikelihood

I understand the discrepance .....  it rise from this  line from  
http://arxiv.org/pdf/1406.5823v1.pdf    pag 27  suggested by professor Walker S.
Thank again 

Conditional variances of random effects

" It is useful to clarify that the conditional covariance concept in lme4 is based on a simplification
of the linear mixed model. In particular, we simplify the model by assuming ..... "