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Personally, I doubt that the GS must use tolvs and the RF tolwfr. In fact, 
some
other programe, like CASTEP, can control only the toldfe.  (But maybe what
Matthieu suggested is safer.)

I guess people who prepared the test files also have different understandings
on this issue. This explains the inconsistency you met.  

A  secure strategy is doing you own tests.


Guangfu Luo


-----------------------------------------------
Dear Matthieu,

I am sorry of my later response and ambiguous expression. I have fully
read netiquette. So,

> you attach an abinit input file to calculate phonons (this is fine).
> The electron phonon calculation is done later in anaddb.
The file I attached is derived from telphon_1.in, in order to
calculation el-phonon interactions and superconducting temperature.
Note that, the first dataset in it is of a ground-state calculation
with criterion tolwfr 1.0d-20(suggested by tutorial lesson Elphon).

But in tutorial RF2, also the FIRST dataset of input file trf2_1.in,
similar ground-state calculation uses the criterion tolvrs 1.0d-18.

Both ground-state scf calculation is to generate a wave function, but
why the criteria are totally different?
May be the Elphon calculation needs a relevant more preciser wave
function in order to compute e-DOS, but in tutorial lesson three,
t35.in the tolerant criterion is toldfe 1.0d-6. I am really confused.
What is the insight within it?

Thank you!

Best regards



-- 
B.W. Dong
State Key Laboratory of Superhard Materials,
Jilin University, Changchun, China. 130012

tq02ksu@gmail.com [ dbw07@mails.jlu.edu.cn ]