<s>
CUTEr	B-Application
(	O
Constrained	O
and	O
Unconstrained	O
Testing	O
Environment	O
,	O
revisited	O
)	O
is	O
an	O
open	B-License
source	I-License
testing	O
environment	O
for	O
optimization	O
and	O
linear	B-Language
algebra	I-Language
solvers	B-Application
.	O
</s>
<s>
CUTEr	B-Application
provides	O
a	O
collection	O
of	O
test	O
problems	O
along	O
with	O
a	O
set	O
of	O
tools	O
to	O
help	O
developers	O
design	O
,	O
compare	O
,	O
and	O
improve	O
new	O
and	O
existing	O
test	O
problem	O
solvers	B-Application
.	O
</s>
<s>
CUTEr	B-Application
is	O
the	O
successor	O
of	O
the	O
original	O
Constrained	O
and	O
Unconstrained	O
Testing	O
Environment	O
(	O
CUTE	O
)	O
of	O
Bongartz	O
,	O
Conn	O
,	O
Gould	O
and	O
Toint	O
.	O
</s>
<s>
The	O
test	O
problems	O
provided	O
in	O
CUTEr	B-Application
are	O
written	O
in	O
Standard	O
Input	O
Format	O
(	O
SIF	O
)	O
.	O
</s>
<s>
Ready-to-use	O
interfaces	O
to	O
existing	O
packages	O
,	O
such	O
as	O
IPOPT	B-Algorithm
,	O
,	O
,	O
,	O
and	O
more	O
are	O
provided	O
.	O
</s>
<s>
The	O
problems	O
in	O
the	O
CUTE	O
subset	O
are	O
also	O
available	O
in	O
the	O
AMPL	B-Language
format	O
.	O
</s>
<s>
linear	B-Algorithm
programming	I-Algorithm
,	O
</s>
<s>
convex	O
and	O
nonconvex	O
quadratic	B-Algorithm
programming	I-Algorithm
,	O
</s>
<s>
more	O
general	O
convex	O
and	O
nonconvex	O
large-scale	O
and	O
sparse	O
equality	O
and	O
inequality-constrained	O
nonlinear	B-Algorithm
programming	I-Algorithm
.	O
</s>
<s>
Over	O
time	O
,	O
the	O
CUTEr	B-Application
test	O
set	O
has	O
become	O
the	O
de	O
facto	O
standard	O
benchmark	O
for	O
research	O
and	O
production-level	O
optimization	O
solvers	B-Application
,	O
and	O
is	O
used	O
and	O
cited	O
in	O
numerous	O
published	O
research	O
articles	O
.	O
</s>
<s>
The	O
SIF	O
is	O
a	O
superset	O
of	O
the	O
original	O
MPS	B-Algorithm
format	I-Algorithm
for	O
linear	B-Algorithm
programming	I-Algorithm
and	O
of	O
its	O
extension	O
QPS	O
for	O
quadratic	B-Algorithm
programming	I-Algorithm
.	O
</s>
<s>
Therefore	O
,	O
access	O
to	O
problem	O
collections	O
such	O
as	O
the	O
linear	B-Algorithm
programs	I-Algorithm
and	O
the	O
convex	O
quadratic	B-Algorithm
programs	I-Algorithm
is	O
possible	O
.	O
</s>
<s>
CUTEr	B-Application
is	O
available	O
on	O
a	O
variety	O
of	O
UNIX	B-Application
platforms	O
,	O
including	O
Linux	B-Application
and	O
Mac	B-Operating_System
OS	I-Operating_System
X	I-Operating_System
,	O
and	O
is	O
designed	O
to	O
be	O
accessible	O
and	O
easily	O
manageable	O
on	O
heterogeneous	O
networks	O
.	O
</s>
