Talk:Fast Kalman filter

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This looks slightly worrying: from one of the pages on the "fast Kalman filter" site linked to from this stub:

Mr. Antti Lange, Ph.D., who works as a senior scientist at the Finnish Meteorological Institute, is challenging Christians all over the world to take part in the battle for the microchip. Because, if it results in wrong hands, it will turn into the mark 666 of the beast spoken of in the book of Revelation. [1].

However, there also seem to be some legitimate references outside of the linked site to Lange as the inventor of a "Fast Kalman Filter". Can peoply knowledgeable in the field let us know whether this an important concept or a fringe concept? -- The Anome 14:17, Feb 17, 2005 (UTC)

[edit] Article cleanup

It is my impression that this article contains a unclear mixture of "method" and "aplications", two properties which should be separated. Furthermore I get the impression that FKF only applies to systems with sparse matrices, since Helmert-Wolf blocking is a methos to solve sparse linear equations. The ordinary Kalman filter is still computationally optimal for general systems. This limitation should be pointed out clearly! --Fredrik Orderud 14:47, 20 May 2005 (UTC)