Zobrazeno 1 - 10
of 72
pro vyhledávání: '"Helenius, Ola"'
Publikováno v:
Instructional Science, 2019 Feb 01. 47(1), 1-18.
Externí odkaz:
https://www.jstor.org/stable/48699556
Autor:
Lindvall, Jannika1 jannika.lindvall@mdh.se, Helenius, Ola2, Eriksson, Kimmo1,3, Ryve, Andreas1,4
Publikováno v:
Scandinavian Journal of Educational Research. Aug2022, Vol. 66 Issue 5, p744-759. 16p.
Publikováno v:
In Teaching and Teacher Education February 2018 70:121-131
Autor:
Helenius, Ola, Stolin, Alexander
There is an Mayer-Vietoris exact sequence involving the Picard group of the integer group ring $\Z C_{p^n}$ where $C_{p^n}$ is the cyclic group of order $p^n$ and $\zeta_{n-1}$ is a primitive $p^n$-th root of unity. The "unknown" part of the sequence
Externí odkaz:
http://arxiv.org/abs/math/0209066
Autor:
Helenius, Ola, Stolin, Alexander
In 1977 Kervaire and Murthy presented three conjectures regarding $K_0 \mathbb{Z} C_{p^n}$, where $C_{p^n}$ is the cyclic group of order $p^n$ and $p$ is a semi-regular prime. The Mayer-Vietoris exact sequence provides the following short exact seque
Externí odkaz:
http://arxiv.org/abs/math/0207286
Publikováno v:
For the Learning of Mathematics, 2017 Jul 01. 37(2), 35-39.
Externí odkaz:
https://www.jstor.org/stable/26548457
Autor:
Tossavainen, Anne, Helenius, Ola
Publikováno v:
Mathematics Teacher Education & Development; 2024, Vol. 26 Issue 1, p1-20, 20p
Publikováno v:
In Journal of Mathematical Behavior December 2016 44:50-64
Autor:
Ahl, Linda Marie1, Helenius, Ola2 ola.helenius@ncm.gu.se
Publikováno v:
Scandinavian Journal of Educational Research. Jun2021, Vol. 65 Issue 4, p633-645. 13p.
Autor:
Boesen, Jesper, Helenius, Ola, Bergqvist, Ewa, Bergqvist, Tomas, Lithner, Johan, Palm, Torulf, Palmberg, Björn
Publikováno v:
In Journal of Mathematical Behavior March 2014 33:72-87