EntityQ427625· pop 13· linked from 103 articleselliptic operatorSign in to saveType of differential operatorConnectionsdifferential operatorEntityLaplace operatorEntityhypoelliptic operatorEntityweak formulationEntityInternational Standard Book NumberEntitydigital object identifierEntityMaxwell's equationsEntityelectrostaticsEntityGauss's lawEntityisomorphismEntityice sheetEntitycontinuum mechanicsEntitypartial differential equationEntityeigenvectors and eigenvaluesEntityLaplace's equationEntitypermittivityEntityannulusEntityAmerican Mathematical SocietyEntityCauchy–Riemann equationsEntityEncyclopedia of MathematicsEntityCategoriesDifferential operatorsElliptic partial differential equations