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Lutz Lehmann

Lutz Lehmann, Dr. math., living in Berlin, Germany

I once was interested in discrete orthogonal wavelet transforms, constructing examples of symmetric 4-channel transforms and more exotic variants in 3, 5, 7, 8 channels using algebraic geometry with an elimination type algorithm (Kronecker in CAS Magma, research group OpTERA).

Nowadays my interest is in numerical algorithms, specifically for differential equations, the history of mathematics and science.

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Top posts (39) All Questions Answers | Votes Newest

6 Support Vector Machines as Neural Nets? Dec 29 '13
5 Evaluating large determinants with multivariate polynomial entries Dec 14 '13
4 4th-order Runge-Kutta method for coupled harmonic oscillator Dec 14 '13
4 Largest negative eigenvalue Dec 15 '13
4 What are projection methods Dec 21 '13
4 A clean way to compute exp(-1/x^2) near x=0 in C? Dec 14 '13
4 What's a nice simple PDE to play with in Matlab? Jan 8
3 Online Parameter Estimation using steepest descent May 21 '19
3 Confusion about Zabusky and Kruskal's stepper for the KdV equation Sep 17 '19
3 RK4 giving wrong result Apr 29 '15
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