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Fundamental groups of 2-complexes with nonpositive planar sectional curvature

Autor: Drakengren, Lycka

We show that the finite simply connected 2-complexes of nonpositive planar sectional curvature are collapsible. Moreover, we show that each finite connected 2-complex with negative planar sectional curvature and fundamental group $\mathbb{Z}$ can be

Externí odkaz: http://arxiv.org/abs/2401.03520

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The density of integral quadratic forms having a $k$-dimensional totally isotropic subspace

Autor: Drakengren, Lycka, Fisher, Tom

We investigate the probability that a random quadratic form in ${\mathbb{Z}}[x_1,...,x_n]$ has a totally isotropic subspace of a given dimension. We show that this global probability is a product of local probabilities. Our main result computes these

Externí odkaz: http://arxiv.org/abs/2212.10495

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Akademický článek

Organotin(IV) complexes derived from 2,6-diacetylpyridine bis(2-hydroxybenzoylhydrazone) as prospective anti-proliferative agents: Synthesis, characterization, structures and in vitro anticancer activity

Autor: Basu Baul, Tushar S., Hlychho, Bietlaichhai, Das Pramanik, Siddhartha, Lyčka, Antonin, Roy, Partha, Mahmoud, Abdallah G., Guedes da Silva, M. Fátima C.

Publikováno v: In Journal of Inorganic Biochemistry December 2024 261

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Akademický článek

First year national Swedish paediatric Hba1c data are at the level of several intervention studies: Results from a Swedish nationwide diabetes register study

Autor: Steineck, Isabelle I.K., Anderzén, Johan, Eeg-Olofsson, Katarina, Ekelund, Jan, Gudbjörnsdottir, Soffia, Hanberger, Lena, Nåtman, Jonatan, Pundziute Lyckå, Auste, Samuelsson, Ulf, Särnblad, Stefan, Åkesson, Karin, Hanas, Ragnar

Publikováno v: In Diabetes Research and Clinical Practice October 2024 216

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Akademický článek

Synthesis and Reactions of Furo[2,3-b]pyrroles

Autor: A. Lycka, M. DandÃƒÂ¡rovÃƒÂ¡, C. A. Ramsden, A. KrutosikovÃƒÂ¡

Publikováno v: Molecules, Vol 2, Iss 4, Pp 69-79 (1997)

Methyl 6H-furo[2,3-b]pyrrole-5-carboxylate (2a) was prepared by thermolysis of the corresponding methyl 2-azido-3-(3-furyl)propenoate (1). 6-Methyl (2b) and 6-benzyl (2c) derivatives were obtained using phase-transfer catalysis conditions (PTC). The

Externí odkaz: https://doaj.org/article/d313611f28ba443d8e1c6127f6eee71c

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