Hi all, I have found several small bugs. They are unrelated but since I am not really able to solve them I put everything in the same message, hoping someone smarter than me will find the solution.
1. For the first one, it was already reported, with an open ticket, but I am worried about it since it produces wrong outputs. The problem appears working with polynomial rings with local orders, e.g., *R.<x,y>=PolynomialRing(QQ,order='neglex')*. If one defines a non constant polynomial with constant leading monomial, e.g. *f=1+x*, the output of *1/f* is *1*; in general, the output of 1/(n+non-constant monomials) is 1/n (n constant different from 0). It seems that the problem comes from the fact that the algorithm to divide polynomials checks if the denominator is a unit and in that case the process is to divide every monomial of the numerator by the constant term (which is assumed to be equal to the whole denominator). This is related to the fact that the result of *(1+x).is_unit()* is *True* while the result of *1/(1+x) in R *is *False*. Maybe the point is that for Singular the actual ring defined as R is not the polynomial ring but the localization by the order (i.e., we can divide by any non-zero polynomial whose leading term is a constant); in fact, for algorithmic purposes one always works with polynomials (taking out the possible denominators wisely), but the ring is not a polynomial. I guess that a small change in the way of dividing polynomial would suffice. 2. When doing some test for the above problem I realize that *R.<x>=PolynomialRing(QQ,order='neglex') *does not take into account the order (the above *f* is not a unit). This is not really an issue, the problem is the fact that the function accept the entry *order* but it ignores it silently. 3. Next one is completely different and I guess it does not have an issue solution. The symbolic integration has issues when integrating square roots. For example, the integration of *sqrt(sin(x)^2)* produces wrong output. 4. Finally, the last problem appeared when compiling sage-6.5 with ssl. I followed the standard instructions (which worked in the previous versions) but the compilation of pyopenssl fails. It complains for the compilation of crl.c because of the static definition of a function already declared in a file x509.h of the package openssl. This function is X509_REVOKED_dup. If one eliminates the word "static" prior to the definition, it works but I do not know if it could cause any issue. I thank the developpers of this software and I am open to collaborate despite my poor level in programming. Best, Enrique. -- You received this message because you are subscribed to the Google Groups "sage-devel" group. To unsubscribe from this group and stop receiving emails from it, send an email to sage-devel+unsubscr...@googlegroups.com. To post to this group, send email to sage-devel@googlegroups.com. Visit this group at http://groups.google.com/group/sage-devel. For more options, visit https://groups.google.com/d/optout.
