253	RWTH Publication No: 47224        2005        IGPM253.pdf
TITLE	Error Controlled Regularization by Projection
AUTHORS	Wolfgang Dahmen, Markus Jürgens
ABSTRACT	The paper is concerned with regularization concepts for the inversion of diffusion processes. The application of the involved evolution operators is based on Dunford integral representations combined with the adaptive application of resolvents using recent wavelet methods. In particular, this allows us to develop and realize numerically, to our knowledge for the first time in this context, an SVD projection method which is compared to several versions of Tikhonov-type schemes. The theoretical findings are complemented by numerical tests shedding some light on the quantitative performance of the schemes.
KEYWORDS	inverse problems, Dunford integrals, quadrature, Tikhonov method, projection methods, truncated SVD expansion, adaptive wavelet methods
PUBLICATION	Electronic transactions on numerical analysis : ETNA 25, 67-100 (2006)