this code was ok few months ago but ko now, I suppose because of the missing parenthesis around the string: I need to write print (" caracteristic polynomial p(x)"), it stop running now. is it possible to update a sagecell code keeping the same link ?, or need I change the link and in this case is it possible to delete the old code ?
<input>:60: DeprecationWarning: invalid escape sequence \d
File "<ipython-input-1-89c4ce1b89cc>", line 85
print " caracteristic polynomial p(x)"
SyntaxError: invalid syntax