<s>
EXC	B-Application
is	O
a	O
condensed	O
matter	O
physics	O
many-body	B-Algorithm
theory	I-Algorithm
software	B-Application
package	I-Application
implementing	O
the	O
Bethe	O
–	O
Salpeter	O
equation	O
in	O
frequency-reciprocal	O
space	O
and	O
on	O
a	O
plane	O
wave	O
basis	O
set	O
.	O
</s>
