<s>
MFEM	B-Language
is	O
an	O
open-source	B-Application
C++	B-Language
library	O
for	O
solving	O
partial	O
differential	O
equations	O
using	O
the	O
finite	B-Application
element	I-Application
method	I-Application
,	O
developed	O
and	O
maintained	O
by	O
researchers	O
at	O
the	O
Lawrence	O
Livermore	O
National	O
Laboratory	O
and	O
the	O
MFEM	B-Language
open-source	B-Application
community	O
on	O
GitHub	B-Application
.	O
</s>
<s>
MFEM	B-Language
is	O
free	B-Application
software	I-Application
released	O
under	O
a	O
BSD	B-Operating_System
license	I-Operating_System
.	O
</s>
<s>
The	O
library	O
consists	O
of	O
C++	B-Language
classes	O
that	O
serve	O
as	O
building	O
blocks	O
for	O
developing	O
finite	B-Application
element	I-Application
solvers	I-Application
applicable	O
to	O
problems	O
of	O
fluid	O
dynamics	O
,	O
structural	O
mechanics	O
,	O
electromagnetics	O
,	O
radiative	O
transfer	O
and	O
many	O
other	O
.	O
</s>
<s>
Arbitrary	O
high	O
order	O
finite	B-Application
elements	I-Application
with	O
curved	O
boundaries	O
.	O
</s>
<s>
H1	O
,	O
H(curl )	O
and	O
H(div )	O
conforming	O
,	O
discontinuous	O
(	O
L2	O
)	O
,	O
and	O
NURBS	B-Algorithm
finite	B-Application
element	I-Application
spaces	O
.	O
</s>
<s>
Local	O
mesh	B-Algorithm
refinement	I-Algorithm
,	O
both	O
conforming	O
(	O
simplex	O
meshes	O
)	O
and	O
non-conforming	O
(	O
quadrilateral/hexahedral	O
meshes	O
)	O
.	O
</s>
<s>
Highly	O
scalable	O
MPI-based	O
parallelism	O
and	O
GPU	B-Architecture
acceleration	O
.	O
</s>
<s>
Wide	O
variety	O
of	O
finite	B-Application
element	I-Application
discretization	O
approaches	O
,	O
including	O
Galerkin	B-Algorithm
,	O
discontinuous	B-Algorithm
Galerkin	I-Algorithm
,	O
mixed	B-Algorithm
,	O
high-order	B-Algorithm
and	O
isogeometric	B-Algorithm
analysis	I-Algorithm
methods	O
.	O
</s>
<s>
Tight	O
integration	O
with	O
the	O
Hypre	B-Library
parallel	O
linear	O
algebra	O
library	O
.	O
</s>
<s>
Many	O
built-in	O
solvers	O
and	O
interfaces	O
to	O
external	O
libraries	O
such	O
as	O
PETSc	B-Language
,	O
SuiteSparse	B-Language
,	O
Gmsh	B-Language
,	O
etc	O
.	O
</s>
<s>
Accurate	O
and	O
flexible	O
visualization	O
with	O
VisIt	O
and	O
ParaView	B-Language
.	O
</s>
<s>
Lightweight	O
design	O
and	O
conservative	O
use	O
of	O
C++	B-Language
templating	O
.	O
</s>
