3,389 research outputs found
Aenictozyras Kistner & Jacobson 1975
No full textAenictozyras Kistner & Jacobson Aenictozyras Kistner & Jacobson, 1975: 39. Type species: Aenictozyras flavus Kistner & Jacobson, by original designation flavus Kistner & Jacobson, 1975: 41 (Aenictozyras, TL: Philippines, Negros Island, Damaguete; HA: Aenictus gracilis) Distribution: PhilippinesPublished as part of Hlaváč, Peter, Newton, Alfred F. & Maruyama, Munetoshi, 2011, World catalogue of the species of the tribe Lomechusini (Staphylinidae: Aleocharinae) 3075, pp. 1-151 in Zootaxa 3075 on page 1
Review of an exhibition of photographs by Peter R. Jacobson of Bolsters\u27 Mills a
No full textReview of an exhibition of photographs by Peter R. Jacobson of Bolsters\u27 Mills at Cry of the Loon Gallery in South Casco
Atanygnathus Jacobson 1909
No full textKey to the Atanygnathus species of Réunion 1 Body perspicuously bi-coloured, pronotum distinctly lighter than head. Elytra longer, wings fully developed............. 2 - Coloration of body more uniform, generally brunneous to piceous, pronotum not distinctly lighter than head, wings missing absent.............................................................................. A. poussereaui sp. n. 2 Aedeagus slim, strongly narrowed apically.................................................. A. variegatus Lecoq - Aedeagus wider, broadly rounded apically...................................................... A. gomyi LecoqPublished as part of Kocian, Matúš & Hlaváč, Peter, 2019, The new species of the genus Atanygnathus Jacobson, 1909 (Coleoptera: Styphylinidae: Staphylininae) from Réunion Island, pp. 141-144 in Zootaxa 4612 (1) on page 143, DOI: 10.11646/zootaxa.4612.1.12, http://zenodo.org/record/323355
The new species of the genus Atanygnathus Jacobson, 1909 (Coleoptera: Styphylinidae: Staphylininae) from Réunion Island
No full textKocian, Matúš, Hlaváč, Peter (2019): The new species of the genus Atanygnathus Jacobson, 1909 (Coleoptera: Styphylinidae: Staphylininae) from Réunion Island. Zootaxa 4612 (1): 141-144, DOI: 10.11646/zootaxa.4612.1.1
The Jacobson Radical of a Propositional Theory
No full textAlongside the analogy between maximal ideals and complete theories, the Jacobson radical carries over from ideals of commutative rings to theories of propositional calculi. This prompts a variant of Lindenbaum's Lemma that relates classical validity and intuitionistic provability, and the syntactical counterpart of which is Glivenko's Theorem. The Jacobson radical in fact turns out to coincide with the classical deductive closure. As a by-product we obtain a possible interpretation in logic of the axioms-as-rules conservation criterion for a multi-conclusion Scott-style entailment relation over a single-conclusion one
The Jacobson radical of rings with nilpotent homogeneous elements
No full textA result of Bergman says that the Jacobson radical of a graded algebra is homogeneous. It is shown that while graded Jacobson radical algebras have homogeneous elements nilpotent, it is not the case that graded algebras all of whose homogeneous elements are nilpotent are Jacobson radical. To contrast this, the following result of the author is slightly extended. Let R be a graded algebra generated in the degree one. If for every n, the n x n matrix algebra over R has all homogeneous elements nilpotent, then R is Jacobson radical.</p
FIGURES 1–4 in The new species of the genus Atanygnathus Jacobson, 1909 (Coleoptera: Styphylinidae: Staphylininae) from Réunion Island
No full textFIGURES 1–4. Atanygnathus poussereaui sp. n. Male sternite VIII (1); aedeagus from ventral view (2); habitus (3); type locality, Plaine des Palmisters (4).Published as part of Kocian, Matúš & Hlaváč, Peter, 2019, The new species of the genus Atanygnathus Jacobson, 1909 (Coleoptera: Styphylinidae: Staphylininae) from Réunion Island, pp. 141-144 in Zootaxa 4612 (1) on page 143, DOI: 10.11646/zootaxa.4612.1.12, http://zenodo.org/record/323355
The Jacobson radical for an inconsistency predicate
No full textAs a form of the Axiom of Choice about relatively simple structures (posets), Hausdorff's Maximal Chain Principle appears to be little amenable to computational interpretation. This received view, however, requires revision: maximal chains are more reminiscent of maximal ideals than it seems at first glance. The latter live in richer algebraic structures (rings), and thus are readier to be put under computational scrutiny. Exploiting this, and of course the analogy between maximal chains and maximal ideals, the concept of Jacobson radical carries over from a ring to an arbitrary set with an abstract inconsistency predicate: that is, a distinguished monotone family of finite subsets. All this makes possible not only to generalise Hausdorff's principle, but also to express it as a syntactical conservation theorem. The latter, which encompasses the desired computational core of Hausdorff's principle, is obtained by a generalised inductive definition. The over-all setting is constructive set theory
Data in support of: Quantifying resilience of coldwater habitat to climate and land use change to prioritize watershed conservation
No full textData for 12,450 lakes in the Upper Midwestern United States used to predict coldwater, oxygenated habitat and how it is predicted to change under scenarios of climate and land use change. Specific fields include lake size, depth, watershed landuse, air temperature characteristics, and presence of the coldwater fish Cisco (Coregonus artedi). Also included are projected air temperatures under mid-Century conditions for each lake.Midwest Glacial Lakes Partnership, Funded by the United States Fish and Wildlife ServiceHansen, Gretchen JA; Wehrly, Kevin E; Vitense, Kelsey; Walsh, Jacob R; Jacobson, Peter C. (2021). Data in support of: Quantifying resilience of coldwater habitat to climate and land use change to prioritize watershed conservation. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/F1DN-MQ40
Rings with Jacobson units
No full textWe introduce and study the notion of JU rings, that are, rings having only Jacobson units. In parallel to the so-called UU rings, these rings also form a large class and have many interesting properties established in the present paper. For instance, it is proved that any exchange JU ring is semi-boolean, and vice versa. This somewhat extends a result due to Lee-Zhou (Glasg. Math. J., 2008) and Danchev-Lam (Publ. Math. Debrecen, 2016).ArticleToyama mathematical journal, vol.38, 2016, Page 61-7
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