Hyperbolic tessellations and generators of ${K}_{\textbf {3}}$ for imaginary quadratic fields
Forum of Mathematics, Sigma, Tome 9 (2021)

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We develop methods for constructing explicit generators, modulo torsion, of the $K_3$-groups of imaginary quadratic number fields. These methods are based on either tessellations of hyperbolic $3$-space or on direct calculations in suitable pre-Bloch groups and lead to the very first proven examples of explicit generators, modulo torsion, of any infinite $K_3$-group of a number field. As part of this approach, we make several improvements to the theory of Bloch groups for $ K_3 $ of any field, predict the precise power of $2$ that should occur in the Lichtenbaum conjecture at $ -1 $ and prove that this prediction is valid for all abelian number fields.
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     author = {David Burns and Rob de Jeu and Herbert Gangl and Alexander D. Rahm and Dan Yasaki},
     title = {Hyperbolic tessellations and generators of ${K}_{\textbf {3}}$ for imaginary quadratic fields},
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David Burns; Rob de Jeu; Herbert Gangl; Alexander D. Rahm; Dan Yasaki. Hyperbolic tessellations and generators of ${K}_{\textbf {3}}$ for imaginary quadratic fields. Forum of Mathematics, Sigma, Tome 9 (2021). doi: 10.1017/fms.2021.9

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