<s>
The	O
term	O
R-matrix	B-Algorithm
has	O
several	O
meanings	O
,	O
depending	O
on	O
the	O
field	O
of	O
study	O
.	O
</s>
<s>
The	O
term	O
R-matrix	B-Algorithm
is	O
used	O
in	O
connection	O
with	O
the	O
Yang	O
–	O
Baxter	O
equation	O
.	O
</s>
<s>
The	O
classical	O
R-matrix	B-Algorithm
arises	O
in	O
the	O
definition	O
of	O
the	O
classical	O
YangBaxter	O
equation	O
.	O
</s>
<s>
In	O
quasitriangular	O
Hopf	O
algebra	O
,	O
the	O
R-matrix	B-Algorithm
is	O
a	O
solution	O
of	O
the	O
Yang	O
–	O
Baxter	O
equation	O
.	O
</s>
<s>
The	O
numerical	O
modeling	O
of	O
diffraction	O
gratings	O
in	O
optical	O
science	O
can	O
be	O
performed	O
using	O
the	O
R-matrix	B-Algorithm
propagation	O
algorithm	O
.	O
</s>
<s>
There	O
is	O
a	O
method	O
in	O
computational	O
quantum	O
mechanics	O
for	O
studying	O
scattering	O
known	O
as	O
the	O
R-matrix	B-Algorithm
.	O
</s>
<s>
Using	O
that	O
work	O
as	O
a	O
basis	O
,	O
an	O
R-matrix	B-Algorithm
method	O
was	O
developed	O
for	O
electron	O
,	O
positron	O
and	O
photon	B-Application
scattering	O
by	O
atoms	O
.	O
</s>
<s>
This	O
approach	O
was	O
later	O
adapted	O
for	O
electron	O
,	O
positron	O
and	O
photon	B-Application
scattering	O
by	O
molecules	O
.	O
</s>
<s>
R-matrix	B-Algorithm
method	O
is	O
used	O
in	O
UKRmol	O
and	O
UKRmol+	O
code	O
suits	O
.	O
</s>
<s>
The	O
user-friendly	O
software	O
Quantemol	O
Electron	O
Collisions	O
(	O
Quantemol-EC	O
)	O
and	O
its	O
predecessor	O
Quantemol-N	O
are	O
based	O
on	O
UKRmol/UKRmol	O
+	O
and	O
employ	O
MOLPRO	B-Application
package	O
for	O
electron	O
configuration	O
calculations	O
.	O
</s>
