README file for LaTeX package: diffcoeff Author: Andrew Parsloe (aparsloe@clear.net.nz) 2016-06-27 diffcoeff.sty allows the easy writing of ordinary and partial differential coefficients of arbitrary order. For mixed partial derivatives, the overall order (algebraic or numeric) is calculated by the package. Optional arguments allow the easy specification of a point of evaluation for ordinary derivatives, or variables held constant for partial derivatives, and the placement of the differentiand (in the numerator or appended). Some tweaking of the display is possible through key = value settings. Secondary commands provide analogous coefficients constructed from D, \Delta and \delta and a command for writing Jacobians. diffcoeffx.sty is diffcoeff.sty 'on steroids', extending that package in ways that are probably unnecessary but have a certain logical forece. The packages require the LaTeX3 bundles, l3kernel and l3packages. There are six files plus this README: diffcoeff.tex, diffcoeff.pdf (compiled from diffcoeff.tex), and diffcoeff.sty; and diffcoeffx.tex, diffcoeffx.pdf and diffcoeffx.sty. The tex and pdf files should be placed in texmf/doc/ latex/diff, and the sty files in texmf/tex/latex/diff.