Mathematical Inequalities & Applications · Volume 25, Issue 3 Sharp nonlinear estimates for multiplying derivatives of positive definite tensor fields 25-48 Pages 751-769 DOI 10.7153/mia-2022-25-48 Downloads Short PDF Full PDF PNG Authors Michal Bathory Keywords non-linear gradient estimate symmetric positive definite tensor field logarithmic convexity matrix calculus Subject classes 35A23 15A69 15A16 76A10