Dear Vladimir, On Mon, Feb 12, 2007 at 10:06:21AM +0000, Vladimir Kisil wrote:

Yes, this is better, but

ASh> + if (eb.info(rational_function))

should it be like that:

+ if (eb.info(info_flags::rational_function))

Sure. diff --git a/ginac/pseries.cpp b/ginac/pseries.cpp index db7cef3..be2a7cf 100644 --- a/ginac/pseries.cpp +++ b/ginac/pseries.cpp @@ -1072,7 +1072,10 @@ ex power::series(const relational & r, int order, unsigned options) const } const ex& sym = r.lhs(); // find existing minimal degree - int real_ldegree = basis.expand().ldegree(sym-r.rhs()); + ex eb = basis.expand(); + int real_ldegree = 0; + if (eb.info(info_flags::rational_function)) + real_ldegree = eb.ldegree(sym-r.rhs()); if (real_ldegree == 0) { int orderloop = 0; do { Best regards, Alexei -- All science is either physics or stamp collecting.