From: Rainer Schöpf <rainer.schoepf@gm...>  20120606 16:03:14

If you update your svn working copy, you see a new version of packages/poly/diff.red It contains two improvements to the differentiation routines. The first comes from odesolve/odepatch.red, by F.J. Wright, in the ongoing work to fold function redefinitions into the main code: Differentiation of a parameterdependent integral must not omit differentiation of the upper limit. E.g. on allowdfint,dfint; depend x,v: df(int(f(v,x),x),v); should give df(xx,vv)*f(vv,xx) + int(df(f(vv,xx),vv),xx) Up to now, the first term was missing. The second change concerns application of the chain rule for interdependent nested derivatives, e.g. df(df(v,x,y,z),a) where v depends on a, when the switch expanddf is on. Tests and examples can be found in packages/regressions/sep052011expanddf.{tst,rlg} Rainer 