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 Feb17 asked Calculus over integers for derivative/integral of factorial? Feb15 asked How to solve a non-linear matrix equation over integer numbers? Feb13 comment What does it mean to represent a number in term of a $2\times2$ matrix? This can be even be done for en.wikipedia.org/wiki/Split-complex_number, see math.stackexchange.com/questions/3510/… Feb12 asked Can my wrong derivation of the Gamma function be fixed? Feb11 accepted Why is the imaginary part of the logarithm of the gamma function a square wave? Feb11 comment Why is the imaginary part of the logarithm of the gamma function a square wave? You are right. The definition of the logarithm for negative values in Mathematica is simply $Im(\log(x))=\pi$ for $x<0$ and $0$ for $x>0$$, see also wolframalpha.com/input/?i=plot+log%5Bx%5D+x%2C+-10%2C+10 . I simply didn't expect such a step in the definition of the logarithm. Feb9 comment Why is the imaginary part of the logarithm of the gamma function a square wave? Ok, the gamma function has poles. This explains maybe the period of the square wave. But why is the imaginary part of the logarithm of the Gamma function a constant (0 or$\pi$) between the poles so that one sees a square wave? Feb9 asked Why is the imaginary part of the logarithm of the gamma function a square wave? Feb5 awarded Commentator Feb5 comment What's the connection between the Laplace transform and the Fourier transform? It seems the Laplace transform given by the LCT is the bilateral Laplace transform or two-sided Laplace transform (en.wikipedia.org/wiki/Two-sided_Laplace_transform). Feb4 answered What's the connection between the Laplace transform and the Fourier transform? Jan28 accepted Are dual numbers a special case of grassmann numbers? Jan26 asked Are dual numbers a special case of grassmann numbers? Jan26 comment Relationship between Levi-Civita symbol and Grassmann numbers? Wouldn't it then be much less confusing to call these$\theta_i$s "Grassmann vectors" instead of "Grassmann numbers"? Jan24 comment Relationship between Levi-Civita symbol and Grassmann numbers? Ok. But then isn't the product$\theta_i\theta_j$a tensor (more precisely a pseudotensor, since it anticommutes)? Jan24 comment Relationship between Levi-Civita symbol and Grassmann numbers? Do I get this right: The notation of a Grassmann number like$\theta_i$does not imply that$\theta$is a vector with$i$components. Instead$\theta_i$is a scalar number like e.g. the imaginary number$i$, correct? So the product of two Grassmann numbers$\theta_i\theta_j\$ is not an outer product of two vectors, but just a product of two scalars. Jan17 revised Relationship between Levi-Civita symbol and Grassmann numbers? Added links Jan17 asked Relationship between Levi-Civita symbol and Grassmann numbers? Jan15 awarded Popular Question Sep17 awarded Teacher