Check that there is one numeraire for each evolution time.
Each numeraire must be an index amongst the rate times so it ranges
from 0 to n. Each numeraire must not have expired before the end of
the step.
Offsetted discretely compounded money market account measure:
for each step the offset-th unexpired bond is used as numeraire.
When offset=0 the result is the usual discretely compounded money
market account measure
Check that there is one numeraire for each evolution time. Each numeraire must be an index amongst the rate times so it ranges from 0 to n. Each numeraire must not have expired before the end of the step.