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2012-01-01 12:28:38 +0100 | marked best answer | pi and e not evaluated when i use my own classes I don't know why this is happening, but here are some workarounds: one option is to replace by A second option: right after the line add the line By the way, you can also replace the "constants" dictionary with to give better precision. |

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2012-01-01 12:28:14 +0100 | commented answer | pi and e not evaluated when i use my own classes Thanks a million time for this indeed helpfull answer. BTW: that behaviour seems like a bug to me. After adding e=e... in the first of the if loops all the others also work fine. Looks like sage forgets about the constants. Should I try to file a bug here? |

2011-12-29 17:18:55 +0100 | commented question | pi and e not evaluated when i use my own classes The Worksheet now is public at http://www.sagenb.org/home/pub/3912. The calculations failing are in the cell containing ###### 7 ######## and the following cell. Sorry for the dirty hacks in there and thanks in advance ;-) |

2011-12-29 17:18:12 +0100 | commented question | pi and e not evaluated when i use my own classes The big question that remains to me is how to do that after miles of symbolic calculations. I tried using a dictionary and that failes. Copy paste is not a too good solution also since the argument I posted is (by far) the shortest. In that case I'd prefer to copy paste it completely to python, because my calculations are to slow and memory consuming anyway. Second I do not get what the difference of RR(-1/exp(1/10*abs(-0.0555555555556*(pi) - 26714619/51021164)) + 1) and -1/RR(e)^(1/10*abs(-0.0555555555556*RR(pi) - 26714619/51021164)) + 1 should be. |

2011-12-22 17:37:56 +0100 | commented question | Problem with sign / sgn and .n() OK, thanks. This : http://ask.sagemath.org/question/1014/pi-and-e-not-evaluated-when-i-use-my-own-classes might be a related problem. There are also some sage constants that are not evaluated at all. |

2011-12-22 16:36:16 +0100 | commented question | pi and e not evaluated when i use my own classes The problem seems to be related to what is imported. Another version where the object calculating the values are created earlier works fine. I imported matplotlib as plt and numpy as np so no modules of these should be conflicting, right? |

2011-12-22 15:38:38 +0100 | asked a question | pi and e not evaluated when i use my own classes This question might be related to this question: http://ask.sagemath.org/question/966/... I have a symbolic calculation and I do evaluate it numerically. Within one of my classes (within my notebook; no external files) I evaluate this term within a for loop. I am getting the following error:
If I copy paste the expression to my notebook it evaluates fine to: I even tried to replace pi and e using a dictionary but I can't get it working. Any ideas what i am doing wrong? Thanks in advance, Markus P.S.: I can make the notebook public if usefull |

2011-12-22 15:28:55 +0100 | commented question | Problem with sign / sgn and .n() Thanks for the answers. Would you mind explaining me what a SD 35.5. fodder ist? |

2011-12-06 15:28:55 +0100 | asked a question | Problem with sign / sgn and .n() I have an urgent problem with the sign function. I have done a symbolic calculation and want to evaluate the result numerically. The symbolic terms have a sgn() function within, which gives me an error when I try to evaluate the expression numerically. Please find the error below. I do not have the slightest ideas why sage can not evaluate that (simple) expression: sign(1050*cos(61075634/181449129) + 900).n() How can i solve that problem? Thanks a lot in advance, Best Markus Error: edit by kcrisman: Here's a minimal example: It doesn't suffice to do |

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