K. S. S. Nambooripad (6 April 1935 – 4 January 2020)[1] was an Indian mathematician who has made fundamental contributions to the structure theory of regular semigroups.

"[3] A full treatment of the theory was published as a single paper number of the Memoirs of American mathematical Society in 1979.

This particular work utilizes the abstract theory of cross-connections to provide a useful framework for studying various classes of regular semigroups.

After a visit to the United States in early 1990s, he brought the TeX programme to Kerala in fourteen floppy disks.

One of his students was E. Krishnan, one of the authors of the LaTeX primer2 published as an electronic book by the Indian TeX User Group.

Another person inspired by Nambooripad was Chandroth Vasudevan Radhakrishnan who is running a company called River Valley Technologies since 1995 for typesetting of scientific journals and books.