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(Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 1999)
A mixed-valence state, formally denoted as Fe 2 . 5 + , is observed in the 300 K Mössbauer spectra of the most reduced samples of SmBaFe 2 O 5 + w . Upon cooling below the Verwey-type transition temperature (TV≈ 200 K ) ...
(Journal article / Tidsskriftartikkel / AcceptedVersion; Peer reviewed, 1999)
We outline the link between automorphisms (symmetries) of manifolds and algebraic K-theory of spaces. Then we discuss recent two-primary calculations for the algebraic K-theory of a point, and obtain a two-primary description ...
(Book / Bok / PublishedVersion; Peer reviewed, 1999)
As originally published by John Wiley & Sons, Ltd.