# optimization - What does R nlminb mean in fact?

I'm using the function nlminb to maximise a function and got convergence (convergence =0 ) with the message false-convergence.

I tried the documentation but no answer. I tried to get the port documentation on the function and could find the function `nlminb`

Can anyone point me to the port documentation of `nlminb`

or explain what does false convergence mean please ?

I also tried other optimization function but though nlminb is a bit obscure, it seems to converge faster than any other function to the right answer. Need to perform more test to make sure. Even using the `nlminb`

through optimx is considerably slow.

It would be a good thing if we understand more how this function work. Fortran coders feel free to help please.

**Edit**
I should have found the code earlier. Here it is but it is still obscure. Can somebody help

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