168,690 research outputs found
On the local-indicability cohen–lyndon theorem
No full textFor a group H and a subset X of H, we let HX denote the set {hxh?1 | h ? H, x ? X}, and when X is a free-generating set of H, we say that the set HX is a Whitehead subset of H. For a group F and an element r of F, we say that r is Cohen–Lyndon aspherical in F if F{r} is a Whitehead subset of the subgroup of F that is generated by F{r}. In 1963, Cohen and Lyndon (D. E. Cohen and R. C. Lyndon, Free bases for normal subgroups of free groups, Trans. Amer. Math. Soc. 108 (1963), 526–537) independently showed that in each free group each non-trivial element is Cohen–Lyndon aspherical. Their proof used the celebrated induction method devised by Magnus in 1930 to study one-relator groups. In 1987, Edjvet and Howie (M. Edjvet and J. Howie, A Cohen–Lyndon theorem for free products of locally indicable groups, J. Pure Appl. Algebra 45 (1987), 41–44) showed that if A and B are locally indicable groups, then each cyclically reduced element of A*B that does not lie in A ? B is Cohen–Lyndon aspherical in A*B. Their proof used the original Cohen–Lyndon theorem. Using Bass–Serre theory, the original Cohen–Lyndon theorem and the Edjvet–Howie theorem, one can deduce the local-indicability Cohen–Lyndon theorem: if F is a locally indicable group and T is an F-tree with trivial edge stabilisers, then each element of F that fixes no vertex of T is Cohen–Lyndon aspherical in F. Conversely, by Bass–Serre theory, the original Cohen–Lyndon theorem and the Edjvet–Howie theorem are immediate consequences of the local-indicability Cohen–Lyndon theorem. In this paper we give a detailed review of a Bass–Serre theoretical form of Howie induction and arrange the arguments of Edjvet and Howie into a Howie-inductive proof of the local-indicability Cohen–Lyndon theorem that uses neither Magnus induction nor the original Cohen–Lyndon theorem. We conclude with a review of some standard applications of Cohen–Lyndon asphericit
Irwin Cohen Collection
No full textIrwin Cohen (1947- ), a bibliophile and book collector, is manager of the Time Warner, Inc., Bookstore in New York City. When was in high school, Mr. Cohen first encountered and read Djuna Barnes's Nightwood, which led him to collect works by and about her. He eventually met Miss Barnes, when his wife, Francesca Belanger, then senior designer at Dial Press was assigned to Miss Barnes's last book, Creatures in an Alphabet. The Cohen collection consists of artwork, clippings, manuscripts, proofs, photographs, and publications by and about Djuna Barnes and her era. Materials related to the publication of Creatures in an Alphabet form a large part of the collection. The books that came with the collection were transferred to the Marylandia and Rare Books Department and the reference collection of the Archives and Manuscripts Department
CFC data from WECT Project (Cohen et al. 2014, JPSP)
No full textThis SPSS file contains data from the 12-item Consideration of Future Consequences scale (Strathman, Gleicher, Boninger, & Edwards, 1994, JPSP), along with demographic information, from the WECT Project:
Cohen, T. R. & Panter, A. T. (2011-2012). The WECT Project: Workplace experiences and character traits [project information]. Information available at: http://www.wectproject.org/ and on the Open Science Framework https://osf.io/w3hgr/.
These data were first used in:
Cohen, T. R., Panter, A. T., Turan, N., Morse, L. A., & Kim, Y. (2014). Moral character in the workplace. Journal of Personality and Social Psychology, 107(5), 943-963. doi: http://dx.doi.org/10.1037/a003724
CFC data from WECT Project (Cohen et al. 2014, JPSP)
No full textThis SPSS file contains data from the 12-item Consideration of Future Consequences scale (Strathman, Gleicher, Boninger, & Edwards, 1994, JPSP), along with demographic information, from the WECT Project:
Cohen, T. R. & Panter, A. T. (2011-2012). The WECT Project: Workplace experiences and character traits [project information]. Information available at: http://www.wectproject.org/ and on the Open Science Framework https://osf.io/w3hgr/.
These data were first used in:
Cohen, T. R., Panter, A. T., Turan, N., Morse, L. A., & Kim, Y. (2014). Moral character in the workplace. Journal of Personality and Social Psychology, 107(5), 943-963. doi: http://dx.doi.org/10.1037/a003724
Upper Cohen-Macaulay Dimension
No full textIn this paper, we define a homological invariant for finitely generated modules over a commutative noetherian local ring, which we call upper Cohen-Macaulay dimension. This invariant is quite similar to Cohen-Macaulay dimension that has been introduced by Gerko. Also we
define a homological invariant with respect to a local homomorphism of local rings. This invariant links upper Cohen-Macaulay dimension with Gorenstein dimension.</p
Austria (Box 1, Folder 1)
No full textLetter to Cohen from Viennese branch of Palestine Foundation Fund, Keren Hajessod, with information on the Austrian Israelite Union. Also includes a letter to Cohen from leader of the Jewish community of Vienna, Dr. Josef Löwenherz.Digital ImageDigital finding aid available
Cohen v. Cohen: por qué el derecho humano a la democracia (local y global) deriva del derecho a la autodeterminación
No full textEn este trabajo intento desafiar la idea presentada por Joshua Cohen de que no existe un derecho humano a la democracia. Para ese fin, utilizo argumentos presentados por el propio Cohen en otras ocasiones. En una primera sección, explico cinco contradicciones en las que creo que incurre Cohen con respecto a sus trabajos previos. En una segunda sección, explico dos conclusiones que creo que se pueden derivar de este desarrollo: primero, que el derecho de libre determinación de los pueblos no impide la existencia de un derecho humano a la democracia (por el contrario, no hay libre determinación posible sin democracia), y segundo, que este razonamiento no solo es aplicable al orden doméstico, sino también al internacional.In this paper, I challenge Joshua Cohen’s denial of the existence of a human right to democracy, using for that purpose arguments presented by Cohen himself in other occasions. In a first section, I explain five contradictions in which I believe Cohen incurs with respect to his previous works. In a second section, I explain two conclusions that I believe can be derived from this development: first, that the right of peoples to self-determination does not impede the existence of a human right to democracy (on the contrary, self-determination is impossible without democracy), and second, that this reasoning is not only applicable to the domestic order, but also to global decision-making.Fil: Maisley, Nahuel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Derecho; Argentin
Official Pardon of Solomon A. Cohen
No full textThe Cohen Family Papers contains material relating to Solomon A. Cohen in particular and the Cohen family in general, including an official pardon from the President Andrew Johnson granting Solomon A. Cohen amnesty for all offences by him committed.Digital imag
Lithuania (Box 1, Folder 16)
No full textTwo manuscripts authored by Cohen: "Vilna - A Citadel of Tradition," typed, 24 pp. and "Changes in Kovno," typed, 17 pp.Digital ImageDigital finding aid available
Anti-Semitism, The Holocaust (Box 3, Folder 41)
No full textManuscripts authored by Cohen concerning the Holocaust, anti-Semitism, and place of Jewry in European society: "Jews in the New Europe," manuscript, typed, 8 pp; "The Jews Under Nazi Tyranny," manuscript, typed, 7 pp; "The Plague of Anti-Semitism," manuscript, typed, 22 pp; "The Destruction of European Jewry," manuscript, typed, 36 pp; "The Martyrdom of a People" (book review by Cohen), manuscript, typed, 3 pp; "The Jewish War Effort," manuscript, typed, 29 pp, and, "The Spiritual Isolation of European Jewry," manuscript, typed, 9 pp.Digital ImageDigital finding aid available
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