In 1854, B Riemann introduced the notion of curvature for spaces with a family of inner products. There was no significant progress in the general case until 1918, when P Finsler studied the variation ...

References 1. P. A. Abrams , The evolution of predator–prey interactions: Theory and evidence, Annu. Rev. Ecol. Syst. 31 (2000) 79–105. Crossref, Google Scholar; 2. K. Agnihotri and H. Kaur , The ...