[Nek5000-users] Double Precision

[nek5000-users at lists.mcs.anl.gov]

Hi,
double precision for Nek means 8 bytes (64bit) per number, which 
corresponds to an epsilon of 1e-16; internally everything is run with 
double precision. So yes, tolerances below 1e-8 are possible, and the 
typical files are written with 16 digits (which can however be changed 
with the parameters).
Philipp

On 2018-11-02 08:50, nek5000-users--- via Nek5000-users wrote:
> Hi, Neks!
> 
> Could I set tolerances less than 10^-8 in solvers via .par or .rea file, 
> or 10^-8 is the minimum? In documentation "double precision" means 8 
> digits, but could Nek5000 write files with 16 digits?
> 
> Best regards,
> Mark
> 
> 
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