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2017-03-29 21:11:58 +0200 | commented answer | Integrate piecewise function with change of variable @calc314 This is awesome... Had I thought about Heaviside for defining my piecewise functions, many of my problems in Sage would have been solved instantly... Thanks |

2017-03-29 02:46:32 +0200 | asked a question | Integrate piecewise function with change of variable I would like to integrate a piecewise defined function while operating a change of variable. I start by defining the function and another variable involved in the change of variable: What I would like to do is integrate the function So I then try to use another variable which I try to define to be 'real' but it results in the same error... Now I try the "lambda" method since it worked when calling the Now I try to use another integration method with Is there any way around this? I really do not know what else to try... |

2017-03-28 16:02:08 +0200 | commented answer | Substitute piecewise function variable @paulmasson Thanks, it worked; and I would at least vote your answer but I lack the minimum 10 points to do so... |

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2017-03-24 21:52:12 +0200 | asked a question | Substitute piecewise function variable I have the following piecewise function: It appears to be a valid function since I can obtain/plot its values for any 'x'. But whenever I try to substitute the variable, it does not work. For example, but if I declare another variable 'h' and try to input that variable into the piecewise function, it does not appear to work: At first I thought that 'h' was not a 'numeric' or 'real' value, but when I test it, it is a real value: How can I overcome this? How can I successfully operate a variable substitution in my piecewise function? |

2017-03-24 21:52:12 +0200 | asked a question | Create a band matrix with repeating and alternating values I have 7 values: a, b, c, d, e, f and g I would like to construct an m by n matrix in this way: And so forth... Therefore, the desired matrix is symmetrical. Values What would be an efficient way to construct this matrix? |

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