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2019-01-03 21:04:34 +0100 | commented question | TypeError 'unable to simplify to float approximation' while trying to define an integral operator I still get an error, I defined K as How can I define them as formal variables? |

2018-12-30 00:55:39 +0100 | asked a question | TypeError 'unable to simplify to float approximation' while trying to define an integral operator Hello, I am trying to define an integral operator acting on a subspace of $L^2(\mathbb{R})$ that depends of time using sage. Being more explicit $W(t)$ takes a real function $f$ and returns another function $g$ defined by \begin{equation} W(t)f(x)=g(x)=\int_{-\infty}^{+\infty}K(x,y,z)f(y)\text{d}y \end{equation} This is the code I came up with With $K$ a reasonable function of $x,y,t$ However I am getting the following error I am pretty sure it's related to the types passed to numerical_integrand What could be a solution? Or a better way to implement it? Thank you all |

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