Sun, Zhi-Wei - Nanjing University. Number and group theory, combinatorics and mathematical logic. Includes papers and lectures. - http://math.nju.edu.cn/~zwsun/
Stewart, Cameron L. - University of Waterloo. Number theory. Publications, preprints, lecture notes. - http://www.math.uwaterloo.ca/PM_Dept/Homepages/Stewart/stewart.shtml
Szalay, László - University of West Hungary. Diophantine equations. - http://titanic.nyme.hu/~laszalay/
Shorey, T. N. - Tata Institute for Fundamental Research. Transcendence, Diophantine equations. Publications. - http://www.math.tifr.res.in/~shorey/
Schmidt, Alexander - Universität Regensburg. Algebraic Number Theory, Higher dimensional class field theory, Iwasawa-theory; Algebraic Geometry, A1-homotopy theory, Motivic (co)homology. Publications. - http://www.mathematik.uni-regensburg.de/Schmidt/index-en.html
Silverberg, Alice - University of California at Irvine. Arithmetic algebraic geometry, applications. Publications, slides, photographs, dances. - http://math.uci.edu/~asilverb/
Sharifi, Romyar - McMaster University. Algebraic Number Theory and Arithmetic Algebraic Geometry. Publications, slides, thesis. - http://www.math.mcmaster.ca/~sharifi/
Stoll, Michael - International University Bremen. Arithmetic Geometry; Combinatorics; Mathematical Biology; Group Theory; Galois Theory. Publications, notes, MAGMA code, tables of genus-2 curves. - http://www.faculty.iu-bremen.de/stoll/
Shallit, Jeffrey O. - University of Waterloo. Algorithmic number theory (primality testing, and factoring), formal languages and automata theory (especially connections with number theory), history of mathematics and computer science, ethical use of computers. - http://www.cs.uwaterloo.ca/~shallit/
Schoof, Rene - Università di Roma “Tor Vergata”. Algebraic number theory, arithmetic geometry. Papers, preprints, lecture notes, resources, tables. - http://www.mat.uniroma2.it/~schoof/
Sofer, Adriana - University of Texas at Austin. Contact and teaching information. - http://rene.ma.utexas.edu/users/asofer/
Smyth, Chris - Edinburgh University. Algebraic number theory, especially algebraic integers which are constrained in some way; algorithmic aspects of algebraic curves; combinatorial aspects of network design. Recent publications. - http://www.maths.ed.ac.uk/~chris/
Swinnerton-Dyer, Sir Peter - University of Cambridge. FRS. Lecture notes. - http://www.dpmms.cam.ac.uk/site2002/People/swinnerton-dyer_hpf.html
Scholl, Anthony J. - University of Cambridge. Number theory, arithmetic algebraic geometry, modular forms. Preprints, notes. - http://www.dpmms.cam.ac.uk/site2002/People/scholl_aj.html
Siligardos, Giorgos - University of Crete. Number theory; technical analysis. - http://www.tem.uoc.gr/~siligard/
Shlapentokh, Alexandra - East Carolina University. Diophantine decidability. Publications. - http://personal.ecu.edu/shlapentokha/
Shonhiwa, Temba - University of Zimbabwe. Number theory, combinatorics, algebra. - http://uzweb.uz.ac.zw/science/maths/staff/shonhiwa.htm
Scheidler, Renate - University of Calgary. Algorithms for computing invariants of number fields and function fields. - http://www.math.ucalgary.ca/~rscheidl/
Snaith, Nina - University of Bristol. Random matrix theory and zeta and L-functions. Offers publications and research projects. - http://www.maths.bris.ac.uk/~mancs/