tkwant.manybody.combine_intervals¶

tkwant.manybody.
combine_intervals
(intervals, atol=1e10, rtol=1e10)[source]¶ Group leads for similar intervals together.
As an example
int_1 = (lead=0, kmin=0, kmax=1..)
int_2 = (lead=1, kmin=0, kmax=1..)
are two intervals, which are similar except the lead index. If the sequenceintervals = [int_1, int_2]
is passed to this routine the lead indices are combined and the returnd result is[(lead=(0, 1), kmin=0, kmax=1...)]
. To test for similarity between the intervals, we compare the attributes, (exept the ones with two leading underscores). For attributes with numerical values a and b, we require abs(a  b) < (atol + rtol * abs(b)) for similarity. Other attributes must match exactly: a == b if a, b != lead. Parameters
intervals (sequence of
tkwant.manybody.Interval
) – Quadrature intervals.atol (float, optional) – Absolute accuracy.
rtol (float, optional) – Relative accuracy.
 Returns
new_intervals – Combined intervals. Lead indices in the combined intervals are grouped in a tuple.
 Return type
list of
tkwant.manybody.Interval