September 2002 - PURRS-devel

purrs/src util.cc
by Tatiana Zolo 21 Sep '02

21 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-21 18:14:26 Modified files: src : util.cc Log message: In `resultant()' used symbol `x' instead of symbol `n'. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/util.cc.diff?cvsroot=pu…

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purrs/src util.cc
by Tatiana Zolo 21 Sep '02

21 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-21 18:09:34 Modified files: src : util.cc Log message: In the function `resultant()' added the case of one of the two polynomials is constant. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/util.cc.diff?cvsroot=pu…

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purrs/src util.cc
by Tatiana Zolo 21 Sep '02

21 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-21 17:41:42 Modified files: src : util.cc Log message: Fixed a bug in the function `resultant()' using function `prem()' instead of `rem()'. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/util.cc.diff?cvsroot=pu…

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Documentation of prem()
by Tatiana Zolo 21 Sep '02

21 Sep '02

Dear all, the documentation about the function prem() (section 5.5.3 of GiNaC 1.0.11) says that the pseudo-remainder of 'a' and 'b' satisfies c*a = b*q + prem(a, b, x), where c = b.lcoeff(x)^(a.degree(x) - b.degree(x) + 1). I think there is maybe a mistake (probably a printing mistake), the formula should be c*a = c*b*q + prem(a, b, x), where c = b.lcoeff(x)^(a.degree(x) - b.degree(x) + 1). Regards, Tatiana Zolo

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purrs/src gosper.cc
by Alessandro Zaccagnini 20 Sep '02

20 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zaccagnini(a)cs.unipr.it 2002-09-20 12:43:19 Modified files: src : gosper.cc Log message: Corrected one spelling mistake. Corrected mistakes in the assignment of the possible degree of the polynomial solution in Gosper's algorithm. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/gosper.cc.diff?cvsroot=…

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purrs TODO.tex
by Alessandro Zaccagnini 20 Sep '02

20 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zaccagnini(a)cs.unipr.it 2002-09-20 12:42:13 Modified files: . : TODO.tex Log message: Added remark on simplification of factorials. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/TODO.tex.diff?cvsroot=purrs…

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purrs/src gosper.cc
by Tatiana Zolo 19 Sep '02

19 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-19 19:51:33 Modified files: src : gosper.cc Log message: Restored a print removed from the previous commit for error. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/gosper.cc.diff?cvsroot=…

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purrs/src gosper.cc gosper.hh
by Tatiana Zolo 19 Sep '02

19 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-19 19:29:32 Modified files: src : gosper.cc gosper.hh Log message: Implemented step four of Gosper's algorithm and other little changes. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/gosper.cc.diff?cvsroot=… http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/gosper.hh.diff?cvsroot=…

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Function `lsolve()'
by Tatiana Zolo 18 Sep '02

18 Sep '02

Dear all, we need to use the function `lsolve()' that appears on page 5 of the tutorial for GiNaC 1.0.10, but not in the Concept Index. We couldn't find it elsewhere, not even in the specifications for the class matrix. We would like to know its specifications, if possible. In particular, we have linear systems whose associated matrix may have some linear dependencies. Thank you very much in advance Alessandro Zaccagnini and Tatiana Zolo

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purrs/src gosper.cc
by Tatiana Zolo 18 Sep '02

18 Sep '02

CVSROOT: /cvs/purrs Module name: purrs Changes by: zolo(a)cs.unipr.it 2002-09-18 17:02:16 Modified files: src : gosper.cc Log message: Changed GSymbol x into GSymbol n. Patches: http://www.cs.unipr.it/cgi-bin/cvsweb.cgi/purrs/src/gosper.cc.diff?cvsroot=…

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