24,231 research outputs found
tritrophic-dispersal-model: Code used for creating figures for "Non-hierarchical dispersal promotes stability and resilience in a tri-trophic metacommunity"
No full text<p>This is the commented code used for creating figures for the paper. Any questions regarding the code should be directed to the corresponding author and repository owner (Eric Pedersen). </p>
Pedersen ideals of tensor products of nonunital C*-algebras
No full textWe show that positive elements of a Pedersen ideal of a tensor product can be
approximated in a particularly strong sense by sums of tensor products of
positive elements. This has a range of applications to the structure of tracial
cones and related topics, such as the Cuntz-Pedersen space or the Cuntz
semigroup. For example, we determine the cone of lower semicontinuous traces of
a tensor product in terms of the traces of the tensor factors, in an arbitrary
C*-tensor norm. We show that the positive elements of a Pedersen ideal are
sometimes stable under Cuntz equivalence. We generalize a result of Pedersen's
by showing that certain classes of completely positive maps take a Pedersen
ideal into a Pedersen ideal. We provide theorems that in many cases compute the
Cuntz semigroup of a tensor product.Comment: circulated as preprint 2017
Odontites verna (Bell.) Dum. subsp. pumila (Nordst.) A. Pedersen in Nederland
No full textThe author gives a brief survey of ecology, distribution, and differences in flowering time of Odontites verna (Bell.) Dum. subsp. verna, subsp. litoralis (Fr.) A. Pedersen, subsp. fennica (Markl.), subsp. serotina (Wettst.) E. F. Warb., and subsp. pumila (Nordst.) A. Pedersen. In a description of the last named differential characters with subsp. serotina are stressed. Subsp. pumila is known from sandy pastures along the coasts of S. W. Sweden, Denmark, N. and N. W. Germany, and the Netherlands. Fig. 1 gives a map, showing the distribution in the Netherlands, based on the material of the Rijksherbarium, Leiden
Pedersen, Christiern
No full textLeksikonartikel om humanisten, forfatteren Christiern Pedersen (c.1480-1554
Froelichia procera Pedersen
No full textFroelichia procera (Seub.) Pedersen in Darwiniana 14: 448. 1967. ÷ Froelichia lanata var. procera Seub. in Mart., Fl. Bras. 5(1): 167. 1875. = Froelichia lanata var. laciniata Suess. in Repert. Spec. Nov. Regni Veg. 39: 6. 1935, syn. nov. Holotypus: PARAGUAY. Guairá: “Ea. Primera ”, I.1932, Jörgensen, P. 4717 (MO [MO- 256764] [foto]!). Isotypi: (BR, C, S). F. lanata var. laciniata: Pedersen (1967: 449) incluye entre los especímenes determinados como F. procera a la colección Jörgensen 4717 sin darse cuenta que se trata del tipo de la var. laciniata . Formalizamos aquí la opinión taxonómica de Pedersen, con la publicación de este sinónimo nuevo.Published as part of Ramella, Lorenzo, 2016, Nomenclatura, tipificaciones y sinónimos nuevos en la familia Amaranthaceae de la Flora del Paraguay, pp. 311-326 in Candollea 71 (2) on page 316, DOI: 10.15553/c2016v712a16, http://zenodo.org/record/572180
Curve-fitting proposed theoretical results to the empirical data in Pedersen [27] (Figure 14), Pedersen [28] (Figure 5), Kloch [29] (Figure 6), and Pedersen [27] (Figure 10), shown in (a), (b), (c) and (d), respectively.
No full text<p>Curve-fitting proposed theoretical results to the empirical data in Pedersen [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132555#pone.0132555.ref027" target="_blank">27</a>] (Figure 14), Pedersen [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132555#pone.0132555.ref028" target="_blank">28</a>] (Figure 5), Kloch [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132555#pone.0132555.ref029" target="_blank">29</a>] (Figure 6), and Pedersen [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0132555#pone.0132555.ref027" target="_blank">27</a>] (Figure 10), shown in (a), (b), (c) and (d), respectively.</p
Story, Hallie Pedersen
No full textReflections on the article "The Clarity That Comes With Hard Times" by author Margaret Renkl
Claus Bjørn, Grundtvig som politiker - Udgivet af Thorkild C.
No full textClaus Bjørn, Grundtvig as politician - published by Thorkild C. LybyReviewed by Vagn Wåhlin and Kim Arne Pedersen
Fig. 77. Cantharomyces spp. A–C. C. numidicus Maire. A, C. Mature thalli. B in Laboulbeniomycetes (Fungi, Ascomycota) of Denmark
No full textFig. 77. Cantharomyces spp. A–C. C. numidicus Maire. A, C. Mature thalli. B. Appendage basal cell in detail. – D–F. C. orientalis Speg. Mature thalli. – G. C. platystethi Thaxt. Mature thallus with labelled antheridium (an). Scale bars: 50 µm. Photographs from slides ZMUC C-F-122850 (A), ZMUC C-F-122935 (B–C), ZMUC C-F-122482 (D), ZMUC C-F-122831 (E), ZMUC C-F-123217 (F), ZMUC C-F-124182 (G).Published as part of Santamaria, Sergi & Pedersen, Jan, 2021, Laboulbeniomycetes (Fungi, Ascomycota) of Denmark, pp. 1-425 in European Journal of Taxonomy 781 on page 318, DOI: 10.5852/ejt.2021.781.1583, http://zenodo.org/record/582892
The Pedersen Rigidity Problem
No full textIf is an action of a locally compact abelian group G on a C*-algebra A, Takesaki-Takai duality recovers (A, α) up to Morita equivalence from the dual action of Ĝ on the crossed product A × α G. Given a bit more information, Landstad duality recovers (A, α) up to isomorphism. In between these, by modifying a theorem of Pedersen, (A, α) is recovered up to outer conjugacy from the dual action and the position of A in M(A ×α G). Our search (still unsuccessful, somehow irritating) for examples showing the necessity of this latter condition has led us to formulate the "Pedersen Rigidity problem". We present numerous situations where the condition is redundant, including G discrete or A stable or commutative. The most interesting of these "no-go theorems" is for locally unitary actions on continuous-trace algebras.Si α es una acción de un grupo abeliano localmente compacto G sobre una C*-álgebra A, la dualidad de Takesaki-Takai recupera (A, α), salvo equivalencia de Morita, de la acción dual de Ĝ sobre el producto cruzado A × α G. Mediante un poco más de información, la dualidad de Landstad recupera (A, α) salvo isomorfismo. De manera intermedia, mediante la modificación de un teorema de Pedersen, (A α) es recuperado, salvo conjugación externa, de la acción dual y de la posición de A en M(A ×α G). Nuestra búsqueda (todavía sin éxito, de alguna manera irritante) de ejemplos que prueben la necesidad de esta última condición, nos ha conducido a a formular el "problema de rigidez de Pedersen". Presentamos numerosas situaciones donde la condición es redundante, incluídos los casos en que G es discreto, o bien A es estable o conmutativo. Lo más interesante de estos "teoremas de no usar" es para acciones localmente unitarias sobre álgebras trazo-continuas
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