add FI logo and support info README and doc front page

README.md

@@ -17,6 +17,9 @@ see `docs/ackn.rst` for full list of contributors.
 
 This is a lightweight CPU library to compute the three standard types of nonuniform FFT to a specified precision, in one, two, or three dimensions. It is written in C++ with interfaces to C, Fortran, MATLAB/octave, Python, and (in a separate [repository](https://github.com/ludvigak/FINUFFT.jl)) Julia. It now also integrates the GPU CUDA library cuFINUFFT.
 
+Docs and installation
+---------------------
+
 Please see the [online documentation](http://finufft.readthedocs.io/en/latest/index.html) which can also be downloaded as a [PDF manual](https://finufft.readthedocs.io/_/downloads/en/latest/pdf/), and a [project overview](https://users.flatironinstitute.org/~ahb/notes/finufft-project-summary-2023.pdf).
 You will also want to see CPU example codes in the directories `examples`, `test`, `fortran`, `matlab/test`, `matlab/examples`, `python/finufft/test`, etc, and GPU examples in `examples/cuda`, `test/cuda`, etc.
 
@@ -46,6 +49,16 @@ If you prefer to read text files, the source to generate the above documentation
 - `docs/ackn.rst`    : authors and acknowledgments
 - `docs/refs.rst`    : journal article references (ours and others)
 
+Support
+-------
+
+<img align="right" src="docs/FIlogo_200.png" width="200">
+
+FINUFFT/cuFINUFFT was developed at, and is supported by,
+the Flatiron Institute at the Simons Foundation.
+
+Citing
+------
 
 If you find (cu)FINUFFT useful in your work, please star this repository and
 cite it and the following. It will help us to improve the library if you also

docs/overview.src

@@ -22,9 +22,13 @@ is written in C++, OpenMP, and calls
 `FFTW <http://www.fftw.org>`_.
 It has been developed since 2017 at the `Center for Computational Mathematics
 <https://www.simonsfoundation.org/flatiron/center-for-computational-mathematics/>`_ at the `Flatiron Institute <https://www.simonsfoundation.org/flatiron>`_,
+a division of the `Simons Foundation <https://www.simonsfoundation.org>`_,
 by :ref:`Alex Barnett and others<ackn>`,
 and is released under an
-`Apache v2 license <https://github.com/flatironinstitute/finufft/blob/master/LICENSE>`_. Here is a `project overview <https://users.flatironinstitute.org/~ahb/notes/finufft-project-summary-2023.pdf>`_.
+`Apache v2 license <https://github.com/flatironinstitute/finufft/blob/master/LICENSE>`_. Here is a `project overview from 2023 <https://users.flatironinstitute.org/~ahb/notes/finufft-project-summary-2023.pdf>`_.
+
+.. image:: FIlogo_200.png
+    :width: 30%
 
 What does FINUFFT do?
 -----------------------