On the doc page http://eigen.tuxfamily.org/dox/group__TutorialSparse.html search for 'Lapace' and replace it by 'Laplace'.
An image under the heading "First Example" is missing. Its URL is http://eigen.tuxfamily.org/dox/Tutorial_sparse_example.jpeg.
Thank you for the report:
Date: 2013-08-12 13:37:47
Summary: Bug 638: fix typos in sparse tutorial
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