6
6.0

Mar 4, 2021
03/21

by
markus Klein (Vazzed)

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This is another Rubics Cube Stand. Its very stable and should work with common Rubics Cubes and speed cubes

Topics: Rubiks_Cube, stl, Toys & Games, thingiverse

5
5.0

Jun 30, 2018
06/18

by
Markus Klein; Elke Rosenberger

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We analyze a general class of difference operators $H_\varepsilon = T_\varepsilon + V_\varepsilon$ on $\ell^2(\varepsilon \mathbb{Z}^d)$, where $V_\varepsilon$ is a one-well potential and $\varepsilon$ is a small parameter. We construct formal asymptotic expansions of WKB-type for eigenfunctions associated with the low lying eigenvalues of $H_\varepsilon$. These are obtained from eigenfunctions or quasimodes for the operator $H_\varepsilon$, acting on $L^2(\mathbb{R}^d)$, via restriction to the...

Topics: Spectral Theory, Mathematical Physics, Mathematics

Source: http://arxiv.org/abs/1702.00965

From https://markus-klein-artwork.de/sid/skypeople.html : Skypeople Released by Jeroen Tel & Markus Klein Maniacs of Noise Another coop for the $11 triangle wave music competition between Jeroen Tel and me. The idea was to compose a song around the famous Skype ringtone. Runs on a factory Commodore 64 with the 8580 SID chip. Tools used: Cheesecutter 2.9, Inkscape, Pixcen, Dr.J's GFX/Song wrapper

Topics: c64, music, sid

4
4.0

Jun 30, 2018
06/18

by
Markus Klein; Andreas Prohl

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We consider an optimal control problem subject to the thin-film equation which is deduced from the Navier--Stokes equation. The PDE constraint lacks well-posedness for general right-hand sides due to possible degeneracies; state constraints are used to circumvent this problematic issue and to ensure well-posedness, and the rigorous derivation of necessary optimality conditions for the optimal control problem is performed. A multi-parameter regularization is considered which addresses both, the...

Topics: Mathematics, Analysis of PDEs, Optimization and Control

Source: http://arxiv.org/abs/1410.2077

53
53

Sep 22, 2013
09/13

by
Markus Klein; Pierre-André Zitt

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We study resonances for the generator of a diffusion with small noise in $R^d$ :$ L_\epsilon = -\epsilon\Delta + \nabla F \cdot \nabla$, when the potential F grows slowly at infinity (typically as a square root of the norm). The case when F grows fast is well known, and under suitable conditions one can show that there exists a family of exponentially small eigenvalues, related to the wells of F . We show that, for an F with a slow growth, the spectrum is R+, but we can find a family of...

Source: http://arxiv.org/abs/0805.0106v1