. . "Mathematics." . . "jeux mathématiques." . . "Matemàtica." . . "Matemáticas." . . "Mathematical recreations." . . . . . "Invitation to mathematics" . "Invitation to mathematics"@en . . . . . . . . . . . . . . . . "Textbooks" . . . . . "Presents historical background and theoretical explanation of the classical branches of mathematics by using over five hundred puzzles and problems. The book is divided into six sections, each complete in itself and dealing with a separate phase of mathematical thought." . . "Mathématiques." . .