2013-08-04 14:46:20 -0500 | answered a question | How to get sage to NOT calculate You can just use strings. Nothing fancy just printing out exactly what you want. |

2013-07-31 07:05:13 -0500 | commented answer | Find minimum value of polynomial You have to remember that: f.find_minimum_on_interval(0,1) does NOT include the end points. This call on f(x) = (x-3)*(x+2)^2 will produce these results: (-17.99999991390072, 0.99999997130024143) While over the interval [0,1] the minimum is located at x=1 If you want to include the endpoints you would need to write something like this: min(f(0), f.find_minimum_on_interval(0,1)[0], f(1)) |

2013-07-27 15:44:49 -0500 | commented answer | find_root return values Just in case you are interested; there is a root function which does this already with a lot higher precision and more options. def find_all_roots(func,a,b): assume( x>=a , x<=b) try: roots = [cp for cp in (func==0).roots(x, ring=RR, multiplicities=False)] except: roots = [ ] return roots find_all_roots((x+x^2-10), -10,10) returns: [-3.70156211871642, 2.70156211871642] find_all_roots((x^2+1), -10, 10) returns: [ ] (sry about the bad spacing, not sure how to format the text here yet) |

2013-07-27 14:42:51 -0500 | commented answer | How to get all (numerical) solutions of an equation? You may also select only the real portion of the answer: by doing something like : [ (real(cp)) for cp in (eq).roots(x, ring=CC, multiplicities=False)] . This will remove the imaginary portion of the answer. |

2013-07-27 14:42:20 -0500 | received badge | ● Supporter (source) |

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