Arnold Emch

1871

• The logica demonstrativa of Girolamo Saccheri
• An introduction to projective geometry and its applications
• Algebraic transformations of a complex variable realized by linkages
• Applications of elliptic functions to problems of closure
• Cyclographic transformation of ordinary space
• Implication and deducibility
• Mathematical models
• Mathematical models, series I-IV
• Newton's five types of plane cubics obtained by the Steinerian transformation
• Notes on the p-discriminant of ordinary linear differential equations
• Projective groups of perspective collineations in the plane treated synthetically
• Some special algebraic transformations realized by linkages