compute lambda[01] from mfb[01] and lpb[01] if not given
compute lambda[01] from mfb[01] and lpb[01] if not given

mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs,mancoast/cado-nfs