Zobrazeno 1 - 10
of 181
pro vyhledávání: '"Shoichi Nakajima"'
Publikováno v:
AIJ Journal of Technology and Design. 25:151-154
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6368e498b76daac951ffe22fbe7512d0
https://doi.org/10.3130/aijt.25.151
https://doi.org/10.3130/aijt.25.151
Publikováno v:
International Journal of Number Theory. 10:283-296
Let p be an odd prime number, Kn = Q(ζpn+1) the pn+1th cyclotomic field and [Formula: see text] the relative class number of Kn. Fixing an integer d ∈ Z with [Formula: see text], we denote by Ln the imaginary quadratic subextension of the imaginar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bb81916744e62f9b5e20e36e7f94a562
https://doi.org/10.1142/s1793042113500929
https://doi.org/10.1142/s1793042113500929
Publikováno v:
Journal of Number Theory. 133:787-801
Let p be an odd prime number with p≠3, and K=Q(cos(2π/p),ζ3). Let Kn be the n-th layer of the cyclotomic Zp-extension over K, and λn the Iwasawa lambda invariant of the cyclotomic Z3-extension over Kn. By a theorem of Friedman, it is known that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::84acc46686ba235c165a2e9b07aa485f
https://doi.org/10.1016/j.jnt.2012.08.022
https://doi.org/10.1016/j.jnt.2012.08.022
Autor:
Shoichi Nakajima, Humio Ichimura
Publikováno v:
Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg. 80:175-182
Let p be an odd prime number, and \(\mbox {\boldmath $B$}_{\infty}\) the cyclotomic \(\mbox {\boldmath $Z$}_{p}\)-extension over the rationals. We show that the 2-part of the ideal class group of \(\mbox {\boldmath $B$}_{\infty}\) is trivial for p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::62460e671ca01ddbb7e148cb6710d53d
https://doi.org/10.1007/s12188-010-0036-x
https://doi.org/10.1007/s12188-010-0036-x
Autor:
Shoichi Nakajima
Publikováno v:
Journal de Théorie des Nombres de Bordeaux. 7:143-154
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8a79b228b10c17597c4ada7ba257dd12
https://doi.org/10.5802/jtnb.137
https://doi.org/10.5802/jtnb.137
Autor:
Shoichi Nakajima, Humio Ichimura
Publikováno v:
J. Math. Soc. Japan 64, no. 1 (2012), 317-342
Let p be an odd prime number and ℓ a prime number with ℓ ≠ p. Let Kn = Q(ζpn+1) be the pn+1-st cyclotomic field. Let hn and hn- be the class number and the relative class number of Kn, respectively. When ℓ = 2, we give an explicit bound mp d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79a331f4affb6f439acfa2fdb2cc36a7
http://projecteuclid.org/euclid.jmsj/1327586985
http://projecteuclid.org/euclid.jmsj/1327586985
Autor:
Humio Ichimura, Shoichi Nakajima
Publikováno v:
Proc. Japan Acad. Ser. A Math. Sci. 88, no. 1 (2012), 16-20
Let $p$ be a prime number with $p \equiv 3 \bmod 4$ and $q=(p-1)/2$. Let $k=\mathbf{Q}(\sqrt{-p})$ and $k_{\infty}/k$ be the cyclotomic $\mathbf{Z}_{p}$-extension. Denote by $h_{n}^{-}$ the relative class number of the $n$-th layer $k_{n}$. Let $\ell
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ccca9b3a84e759a9594e4948e6f9ff31
https://doi.org/10.3792/pjaa.88.16
https://doi.org/10.3792/pjaa.88.16
Publikováno v:
Canadian Journal of Chemistry. 72:357-361
Phenylacetic esters and phenylacetonitriles were alkylated with alkyl halides, at the position α to an ester or nitrile, either at room temperature (20 °C) or at −78 °C, by making use of electrogenerated triphenylmethyl anion (trityl anion). Dou
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3d0c6f14c1bd7eee4686c10e01073b90
https://doi.org/10.1139/v94-055
https://doi.org/10.1139/v94-055
Publikováno v:
Phytochemistry. 32:1177-1181
Recently the minor metabolises, PC-M5′and PC-M6, were isolated along with the tremorgenic mycotoxins, penitrems A–F, from the mycelium of Pencillium crustosum , which was found contaminating bread intended for school lunches in Tokyo city. Two ne
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::61d086051061bd4440c2b3b05fadb22c
https://doi.org/10.1016/s0031-9422(00)95087-8
https://doi.org/10.1016/s0031-9422(00)95087-8
Autor:
Miyako Shimamura, Koohei Nozawa, Mitsuko Kato, Shohei Suzuki, Ken-ichi Kawai, Shoichi Nakajima
Publikováno v:
ChemInform. 23
Electrochemical methoxylation at the active methylene group of phenylacetates and 1-naphthaleneacetate was conducted successfully at room temperature, in methanol containing potassium iodide as an electron carrier and solium methoxide as a bade and a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bc601fb1e69631bfff2ead2862a93fc7
https://doi.org/10.1002/chin.199249052
https://doi.org/10.1002/chin.199249052