11.9 Contracted set definitions

General specification of a contracted function. *first.last* defines the range
of primitives to be contracted. The order corresponds to the primitives as specified
on the previous input card. *c1, c2* are the
contraction
coefficients. Continuation onto a subsequent card is permitted as shown.

b) `C`;

Use default contractions from the library. This applies to both the number of contracted primitives and also to the number of different contraction sets.

c) `C`,*first.last*;

contracted functions taken from
library. *first.last* defines the range of
primitives to be contracted. If is omitted and *first.last* is specified,
. If *first.last* is omitted, the library default values are used. If
both and *first.last* are omitted, default values for both are used.

d) `C`,*first.last,record.file,orb.sym*;

contracted functions taken from orbitals *orb*, ,.., of
symmetry *sym* on molpro file *record.file*. The first nonzero coefficient in
the specified orbital corresponds to the first associated basis function.
*first.last* specifies the range of primitives to be contracted.
If *first.last* is omitted, all coefficients from the specified orbitals
are used.

**Example**`2C,1.12,2100.2,1.1`

generates two contractions, using the first 12 coefficients from orbitals 1.1 and 2.1. The orbitals are read from record 2100.2.

molpro@molpro.net 2019-06-17