While reading the CASINO documentation I discovered:
Gaussian basis functions can be regarded as localized if they are truncated to zero outside a certain
radius. This is done by default in casino: Gaussian functions exp(−ar²) are assumed to be zero
when exp(−ar²) < 10^-GT , where GT is the gautol input parameter (default 7).
What about slater functions in this context?
Best wishes, Vladimir.
Don't let your soul grow lazy!
Don't waste your days in vain and void.
The soul must work — be ever busy,
By day and night, by night and day employed!