142,689 research outputs found

    Neumann Family, Berlin Collection 1912-2011

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    The collection includes documents pertaining to the Neumann family of Berlin, originally of Pyritz (now Pyrzyce). Included is a brief history of the family's cigar company in Berlin, founded by Julius Neumann; documents pertaining to the life and career of pediatrician Hugo Neumann (son of Julius Neumann), including obituary, eulogy, circular and poem about the children's clinic he founded, and photograph; and brief history and family tree of the Neumann, Hurwitz, Samuel, and Meyer families.The original German-language inventory is available in the folderMaterials from AR 1057 and AR 11864 added (David B. Neumann donor collections consolidated)Processed for digitizationSent for digitizationReturned from digitizationLinked to online manifestationdigitize

    Three nontrivial solutions for the p-Laplacian Neumann problems with a concave nonlinearity near the origin

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    We consider a nonlinear Neumann problem driven by the p- Laplacian, with a right-hand side nonlinearity which is concave near the origin. Using variational techniques, combined with the method of upper-lower solutions and with Morse theory, we show that the problem has at least three nontrivial smooth solutions, two of which have a constant sign (one positive and one negative).FCTPOCI/MAT/55524/200

    Going Beyond Counting First Authors in Author Co-citation Analysis

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    The present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed

    Introducing Formalism in Economics: The Growth Model of John von Neumann

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    The objective is to interpret John von Neumann's growth model as a decisive step of the forthcoming formalist revolution of the 1950s in economics. This model gave rise to an impressive variety of comments about its classical or neoclassical underpinnings. We go beyond this traditional criterion and interpret rather this model as the manifestation of von Neumann's involvement in the formalist programme of mathematician David Hilbert. We discuss the impact of Kurt Gödel’s discoveries on this programme. We show that the growth model reflects the pragmatic turn of the formalist programme after Gödel and proposes the extension of modern axiomatisation to economics..Von Neumann, Growth model, Formalist revolution, Mathematical formalism, Axiomatics

    Parameterized Complexity Analysis of Randomized Search Heuristics

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    This chapter compiles a number of results that apply the theory of parameterized algorithmics to the running-time analysis of randomized search heuristics such as evolutionary algorithms. The parameterized approach articulates the running time of algorithms solving combinatorial problems in finer detail than traditional approaches from classical complexity theory. We outline the main results and proof techniques for a collection of randomized search heuristics tasked to solve NP-hard combinatorial optimization problems such as finding a minimum vertex cover in a graph, finding a maximum leaf spanning tree in a graph, and the traveling salesperson problem.Frank Neumann and Andrew M. Sutto

    Das Tragische / von Max Neumann

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    DAS TRAGISCHE / VON MAX NEUMANN Das Tragische / von Max Neumann (1) Cover (1) Title page (3) Titelseite (5) Widmung (7) Vorwort (9) Verzeichniß der in der Abhandlung erwähnten Schriftsteller. (11) Druckvermerk (14) Vorwort (15) Inhalt. (17) Eingang. (21) I. Theil. Das Tragische in der einfachen Menschengröße. (31) I. Tragik des nur unsittlichen Menschen. (36) II. Tragik des alltäglichen Menschen. (50) III. Das Tragische in der einfachen Geistesgröße des Menschen. (55) IV. Das Tragische in der einfachen Gefühlsgröße des Menschen. (110) a. Tragik der Gefühlsgrößen selbst. (111) b. Tragik dieser Gefühlsgrößen im Kampfe mit den ihnen ... (199) c. Einwirkung der Art des Unterganges der Gefühlsgröße ... (305) II. Theil Das Tragische in der erhöhten Menschengröße. (329) I. Tragik der menschheitlichen Größe des Menschen. (331) II. Tragik des Kampfes zwischen der menschheitlichen Größe und ... (374) III. Tragik der Menschheits-Größe des Menschen. (392) IV. Tragische Kraft der naiven und sentimentalischen Dichtung. (404) Verzeichniß derb in der Abhandlung erwähnten Schriftsteller. (419

    Irrational behavior in the Brown-von Neumann-Nash dynamics

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    We present a class of games with a pure strategy being strictly dominated by another pure strategy such that the former survives along most solutions of the Brown-von Neumann-Nash dynamics.Nash map, BNN dynamics, Dominated strategies

    Dispelling the Myths Behind First-author Citation Counts

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    We conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more sophisticated methods
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