Docs: Updating landing page, remove file tree figure

doc/shared/SundialsOrganization.rst

@@ -42,17 +42,10 @@ nonlinear solver interfaces (abstract base classes), and the corresponding class
 implementations provided with SUNDIALS. For classes that provide interfaces to
 third-party libraries (i.e., LAPACK, KLU, SuperLU_MT, SuperLU_DIST, *hypre*,
 PETSc, Trilinos, and Raja) users will need to download and compile those
-packages independently of SUNDIALS. The directory structure is shown in
-:numref:`Organization.Sundials.DirectoryStructure`.
+packages independently of SUNDIALS.
 
 .. _Organization.Sundials.HighLevelDiagram:
 .. figure:: /figs/sunorg1.png
    :align: center
 
    High-level diagram of the SUNDIALS suite.
-
-.. _Organization.Sundials.DirectoryStructure:
-.. figure:: /figs/sunorg2.png
-   :align: center
-
-   Directory structure of the SUNDIALS source tree.

doc/superbuild/source/arkode/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _ARKODE:
+
 ********************
 ARKODE Documentation
 ********************

doc/superbuild/source/cvode/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _CVODE:
+
 *******************
 CVODE Documentation
 *******************

doc/superbuild/source/cvodes/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _CVODES:
+
 ********************
 CVODES Documentation
 ********************

doc/superbuild/source/ida/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _IDA:
+
 *******************
 IDA Documentation
 *******************

doc/superbuild/source/idas/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _IDAS:
+
 ******************
 IDAS Documentation
 ******************

doc/superbuild/source/index.rst

@@ -16,18 +16,11 @@
 SUNDIALS Documentation
 ######################
 
-This is the documentation for the `SUNDIALS
-<https://computing.llnl.gov/projects/sundials>`_ suite of
-nonlinear and differential/algebraic equation solvers.
-
-SUNDIALS is developed on `GitHub <https://github.com/LLNL/sundials>`_.
-
 .. toctree::
    :maxdepth: 1
    :numbered:
    :hidden:
 
-   Organization_link.rst
    sundials/index.rst
    arkode/index.rst
    cvode/index.rst
@@ -46,22 +39,35 @@ SUNDIALS is developed on `GitHub <https://github.com/LLNL/sundials>`_.
    developers/index.rst
    References
 
+The `SUNDIALS <https://computing.llnl.gov/projects/sundials>`_ library of time
+integrators and nonlinear solvers provides robust and efficient numerical
+methods for ordinary differential equations (ODEs), differential-algebraic
+equations (DAEs), and nonlinear algebraic systems. SUNDIALS is freely available
+and developed on `GitHub <https://github.com/LLNL/sundials>`_.
 
-Contributors
-============
+SUNDIALS is comprised of following packages:
 
-The SUNDIALS library has been developed over many years by a number of
-contributors. The current SUNDIALS team consists of Cody J.  Balos,
-David J. Gardner, Alan C. Hindmarsh, Daniel R. Reynolds, and Carol S.
-Woodward. We thank Radu Serban for significant and critical past contributions.
+* :ref:`ARKODE <ARKODE>`, a solver with one-step methods for stiff, nonstiff,
+  mixed stiff-nonstiff, and multirate ODE systems.
 
-Other contributors to SUNDIALS include: James Almgren-Bell, Lawrence E. Banks,
-Peter N. Brown, George Byrne, Rujeko Chinomona, Scott D. Cohen, Aaron Collier,
-Keith E. Grant, Steven L. Lee, Shelby L. Lockhart, John Loffeld, Daniel McGreer,
-Yu Pan, Slaven Peles, Cosmin Petra, Steven B. Roberts, H. Hunter Schwartz,
-Jean M. Sexton, Dan Shumaker, Steve G. Smith, Shahbaj Sohal, Allan G. Taylor,
-Hilari C. Tiedeman, Chris White, Ting Yan, and Ulrike M. Yang.
+* :ref:`CVODE <CVODE>`, a solver with Adams and BDF methods for stiff and
+  nonstiff ODE systems.
+
+* :ref:`CVODES <CVODES>`, an extension of CVODE with forward and adjoint
+  sensitivity analysis capabilities for stiff and nonstiff ODE systems.
+
+* :ref:`IDA <IDA>`, a solver with BDF methods for DAE systems.
 
+* :ref:`IDAS <IDAS>`, an extension of IDA with forward and adjoint sensitivity
+  analysis capabilities for DAE systems.
+
+* :ref:`KINSOL <KINSOL>`, a solver for nonlinear algebraic systems.
+
+The SUNDIALS packages share many components and are organized as a family built
+on a common infrastructure including abstract interfaces for vectors, matrices,
+and algebraic solvers. Several implementations of these interfaces are provided
+with SUNDIALS supporting a range of parallel computing paradigms including
+shared-memory, distributed memory, and GPU computing.
 
 Citing
 ======
@@ -152,6 +158,20 @@ they are using rather than the combined SUNDIALS online guide:
       howpublished = {\url{https://sundials.readthedocs.io/en/latest/kinsol}}
    }
 
+Contributors
+============
+
+The SUNDIALS library has been developed over many years by a number of
+contributors. The current SUNDIALS team consists of Cody J.  Balos,
+David J. Gardner, Alan C. Hindmarsh, Daniel R. Reynolds, and Carol S.
+Woodward. We thank Radu Serban for significant and critical past contributions.
+
+Other contributors to SUNDIALS include: James Almgren-Bell, Lawrence E. Banks,
+Peter N. Brown, George Byrne, Rujeko Chinomona, Scott D. Cohen, Aaron Collier,
+Keith E. Grant, Steven L. Lee, Shelby L. Lockhart, John Loffeld, Daniel McGreer,
+Yu Pan, Slaven Peles, Cosmin Petra, Steven B. Roberts, H. Hunter Schwartz,
+Jean M. Sexton, Dan Shumaker, Steve G. Smith, Shahbaj Sohal, Allan G. Taylor,
+Hilari C. Tiedeman, Chris White, Ting Yan, and Ulrike M. Yang.
 
 SUNDIALS License and Notices
 ============================

doc/superbuild/source/kinsol/index.rst

@@ -10,6 +10,8 @@
    SUNDIALS Copyright End
    ----------------------------------------------------------------
 
+.. _KINSOL:
+
 ********************
 KINSOL Documentation
 ********************

doc/superbuild/source/sundials/index.rst

@@ -16,11 +16,9 @@
 Using SUNDIALS
 **************
 
-As discussed in :numref:`Organization`, the six solvers packages
-(CVODE(S), IDA(S), ARKODE, KINSOL) that make up SUNDIALS are built upon common
-classes/modules for vectors, matrices, and algebraic solvers. In addition, the
-six packages all leverage some other common infrastructure, which we discuss
-in this section.
+The packages that make up SUNDIALS are built upon shared classes for vectors,
+matrices, and algebraic solvers. In addition, the packages all leverage some
+other common infrastructure, which we discuss in this section.
 
 .. toctree::
    :maxdepth: 1