Seki,
Kowa (Takakazu) Shannon,
Claude Elwood Simpson,
Thomas Sitter,
Willem de Skolem,
Thoralf Albert Snell,
Willebrord Sommerville,
Duncan MacLaren Young Steiner,
Jakob Stevinus,
Simon Stieltjes,
Thomas Jan Sylow,
Ludwig Mejdell Sylvester,
James Joseph