diffcoeff (27jun16)

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+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.
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