$par
[1] 1950.1445350 1974.3388670 2015.1653455 2026.8446040    0.8428804

$objective
[1] 0.3989732

$convergence
[1] 0

$iterations
[1] 32

$evaluations
function gradient 
      35      189 

$message
[1] "both X-convergence and relative convergence (5)"

