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2016-09-06 23:18:07 +0100 | commented answer | How to solve ODE y'' - 4y' + y - x = 0 using rk4? I got a way to solve the differential equation. If wrong please correct;) To solve this differential equation we must first make a variable substitution to reduce the differential equation for a first order and thus create a system of ODEs. variable change: w1 = y w2 = y w3 = y ' Thus, deriving the above variables, we have a system of equations of the form: w1 '= w2 w2 '= f (x, w1, w2) = 4 * w2 + x desolve_system_rk4([w2, 4*w2 + x ],[w1 , w2], ics = [0,1,0],ivar = x, step = 0.1, end_points = 2) |

2016-09-06 19:08:22 +0100 | answered a question | How to solve ODE y'' - 4y' + y - x = 0 using rk4? I tryed But does no work correty :( |

2016-09-06 03:29:59 +0100 | asked a question | How to solve ODE y'' - 4y' + y - x = 0 using rk4? How to solve ODE y''+y''-4y'+x = 0 using rk4? |

2016-09-03 16:31:27 +0100 | asked a question | How to run sagemathcloud dockerw Hi everybody How to run smc cloud? I tryed docker run -v ~/smc:/projects -P williamstein/sagemathcloud and occured: hub.js daemon successfully started
node run/hub.js start --host=localhost --database_nodes localhost --port 5000 --proxy_port 5001 --base_url= --single --logfile /smc/src/../logs/hub.log --pidfile /smc/src/../pids/hub.pid
hub start --host=localhost --database_nodes localhost --port 5000 --proxy_port 5001 --base_url= --single --logfile /smc/src/../logs/hub.log --pidfile /smc/src/../pids/hub.pid |

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2016-05-16 04:45:55 +0100 | asked a question | How to install seaborn in sagemath cloud? How to install seaborn in sagemath cloud? |

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2016-03-20 19:37:23 +0100 | answered a question | sage 7 installation failed through ppa on ubuntu 14.04 I got this: in SageMath folder ( uncompressed ) wait compile and then delete the " .sage " folder in /home/user. |

2016-03-11 14:46:12 +0100 | received badge | ● Notable Question (source) |

2016-02-22 05:17:23 +0100 | commented answer | Double Integral hi, willmwade how to discovery the function of item [0]? |

2016-02-22 04:34:44 +0100 | answered a question | Failure to Connect to Web Server let try: open terminal virtual machine and type: copy the ip after, type: in firefox, by host machine, use: ip_virtual_machine:8080 |

2016-02-22 04:22:49 +0100 | asked a question | How to numerical double integral? How to numerical double integral? |

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2016-02-12 15:33:06 +0100 | commented question | Why the Maxima worksheets is not rendering latex / MathJax? when I use the worksheet to evaluate sagemath sage code, the result is better presented on the screen (here will not be shown). In Maxima the code result leaves unformatted. |

2016-02-12 15:24:08 +0100 | commented question | how to user a external program to plot graphic? I really want to see the graphics out of sagemath, in another window (ex: gnuplot.plot3d (f = 'cos (x) + sin (y) * 2', xmin = -1, xmax = 1, ymin = -1, ymax = 1, -1 = zmin, zmax = 1, title = None, samples = 25 = 20 isosamples, xlabel = x, ylabel = 'y', interact = True)). Is okay only the first visualization, then does not work. I could not see 2d. |

2016-02-12 15:23:44 +0100 | answered a question | how to user a external program to plot graphic? I really want to see the graphics out of sagemath, in another window (ex: gnuplot.plot3d (f = 'cos (x) + sin (y) * 2', xmin = -1, xmax = 1, ymin = -1, ymax = 1, -1 = zmin, zmax = 1, title = None, samples = 25 = 20 isosamples, xlabel = x, ylabel = 'y', interact = True)). Is okay only the first visualization, then does not work. I could not see 2d. |

2016-02-09 04:10:44 +0100 | commented answer | How to import the file "function.py" to worksheet sage? sagemath loaded by virtual machine (VirtualBox) Hi I solved the problem I created the file function fiboR_SG.py below def fiboR_SG(n): upload fiboR_SG.py using "DATA" in Worksheet menu. In the "You may download fiboR_SG.py or create a link to this file in worksheet" select your worksheet. Back worksheet and use: import fiboR_SG ("no .py") fiboR_SG. fiboR_SG(10) OK :) |

2016-02-09 04:10:22 +0100 | answered a question | How to import the file "function.py" to worksheet sage? sagemath loaded by virtual machine (VirtualBox) Hi I solved the problem I created the file function fiboR_SG.py below upload fiboR_SG.py using "DATA" in Worksheet menu. In the "You may download fiboR_SG.py or create a link to this file in worksheet" select your worksheet. Back worksheet and use: import fiboR_SG ("no .py") OK :) |

2016-02-08 01:00:19 +0100 | commented answer | how do I install an spkg? I tryed, but:
make: |

2016-02-07 15:26:07 +0100 | commented answer | How to import the file "function.py" to worksheet sage? sagemath loaded by virtual machine (VirtualBox) Hello tmolteil my files are on the local machine and the sagemath runs on the virtual machine. I tried that way, but only import virtual machine files, not the host machine. |

2016-02-06 21:12:15 +0100 | asked a question | How to import the file "function.py" to worksheet sage? sagemath loaded by virtual machine (VirtualBox) i want to import a file function called "function.py" to my Worksheet. How to do? |

2016-02-05 02:24:02 +0100 | received badge | ● Editor (source) |

2016-02-04 20:32:43 +0100 | asked a question | how to user a external program to plot graphic? how to user a external program to plot graphic? ex: gnuplot, xmaxima, mgnuplot.... |

2016-02-04 20:10:41 +0100 | asked a question | Why the Maxima worksheets is not rendering latex / MathJax? I use Maxima with sagemath and do not know why the results are not rendered |

2016-01-24 02:20:11 +0100 | received badge | ● Student (source) |

2016-01-24 00:01:28 +0100 | asked a question | how to add julia sage notebook? how to add julia in sagemath notebook? |

2016-01-05 03:49:14 +0100 | commented answer | curve fitting coefficients. ## marked ;) |

2016-01-05 03:47:21 +0100 | marked best answer | curve fitting coefficients. get the model coefficients, but I can not use them to plot the graph. How to solve? see the code: |

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