vonjd
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 Jan11 answered Connections between the solution of simple ordinary equation, normal distribution and heat equation Jan7 asked Connections between the solution of simple ordinary equation, normal distribution and heat equation Jan5 asked Can a differential equation be linear or nonlinear at the same time? Jan4 asked Geometric interpretation of determinant of a system of homogenous linear equations May16 asked Why do you need an integral to invert the Z-Transform? May13 asked Example for finite dimensional analog of integral transforms Mar8 asked Intuition and counterexamples for higher-order derivative test Jan24 asked How to ensure that you haven't run into a paradox proving a theorem e.g. by proof by contradiction? Nov25 asked How to see and proof that the hyperbola as a constant difference of distances holds for $\frac{1}{x}$? Oct6 asked How to estimate the size of a ratio with very large factorials? Sep16 answered Intuitive Explanation of Bessel's Correction Sep8 answered How many ways to choose $k$ out of $n$ numbers with exactly/at least $m$ consecutive numbers? Sep8 asked How many ways to choose $k$ out of $n$ numbers with exactly/at least $m$ consecutive numbers? Jul31 asked In which senses can an integral exist? Jul31 asked Hard integral that standard CAS get totally wrong Jun23 answered Portfolio which replicates given payoff Jun19 answered Probability problem Apr10 answered Eigenvectors and Principal component Apr9 answered Rewriting the integral $\mathrm{erf}(x) = \frac{1}{\sqrt{\pi}} \int_{-x}^x e^{-t^2} dt.$ Apr1 answered Interpret the equation $17+28y+4x^2+4y^2=8x$ geometrically