1,732,339 research outputs found
[Debora e Sisara : extraits / Pietro Alessandro Guglielmi]
No full textTitre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Debora e Sisara]. Extrait (italien)Titre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Debora e Sisara. Partie 2, scène 10. Io cedo a detti tuoi]Titre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Debora e Sisara. Partie 1, scène 4. Al mio contento in seno]Titre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Debora e Sisara. Partie 1, scène 1. Ah qual viltade è questa popoli]Titre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Debora e Sisara. Partie 1, scène 11. Perfido a questo eccesso]Comprend : Aria Seria // Io cedo a detti tuoi // Del Sigr : Pietro Guglielmi // nella Debora e Sisara // in Napoli ; Debora e Sisara // Duettino // Al mio contento in seno // Musica // Del Sig.r Pietro Guglielmi ; Debora, e Sisara // Introduzzione // Musica // Del Sig.r Pietro Guglielmi ; Debora, e Sisara // Quartetto con Rec.vo // Perfido à questo eccesso // Musica // Del Sig.r Pietro GuglielmiContient 4 extraits de "Debora e Sisara", azione sacra en 2 parties. - Livret de Carlo Sernicola. - 1re représentation : Naples, San Carlo, 1788. - Foliotation au crayon d'une main plus tardive. - Erreurs de foliotation : 1 f. blanc entre les f. 16 et f. 17 puis entre les f. 43 et f. 44. - À partir de f. 27 : copie d'une autre mainPrésentation musicale : [Partition]Appartient à l’ensemble documentaire : RISM2Appartient à l’ensemble documentaire : RISMMssOratorios -- +* 1700......- 1799......+:18e siècle
Asymptotic stability barriers for natural Runge--Kutta processes for delay equations
No full textThis paper investigates the asymptotic stability properties of a class of numerical
methods for delay differential equations (DDEs), the so-called natural Runge–Kutta methods.
We first examine the behavior of these methods when applied to the neutral model equation
y'(t) = a y(t) + b y(t − 1) + c y'(t − 1) with a, b, c ∈ R (we also consider the case when a, b, c ∈ C)
and provide a suitable geometric characterization of their asymptotic stability regions.
Then, by means of the obtained results, in conjunction with those given in [N. Guglielmi and E. Hairer, IMA J. Numer. Anal., 21 (2001), pp. 439–450], we are able to give a final answer concerning the possible preservation of asymptotic stability of the considered class of methods when applied to systems of linear DDEs of the form
y'(t) = L y(t) + M y(t − 1) with L, M ∈ R^d×d, d > 1.
We are interested here in methods that produce stable numerical solutions for all values of the parameters (a, b, and c in the first equation and L and M in the second one) for which the exact
solution tends to zero. To this aim we direct our attention to a novel stability setting, recently
introduced and investigated for the scalar nonneutral case (see [N. Guglielmi, Numer. Math., 77 (1997), pp. 467–485, N. Guglielmi, IMA J. Numer. Anal., 18 (1998), pp. 399–418, N. Guglielmi and E. Hairer, Numer. Math., 83 (1999), pp. 371–383, N. Guglielmi and E. Hairer, IMA J. Numer. Anal., 21 (2001), pp. 439–450, S. Maset, Numer. Math., 87 (2000), pp. 355–371])
Canonical construction of polytope Barabanov norms and antinorms for sets of matrices.
No full textBarabanov norms have been introduced in Barabanov (1988) and constitute an important instrument to analyze the joint spectral radius of a family of matrices and related issues.
However, although they have been studied extensively, even in very simple cases
it is very difficult to construct them explicitly (see, e.g., Kozyakin (2010)).
In this paper we give a canonical procedure to construct them exactly, which associates a polytope extremal norm - constructed by using the methodologies described in Guglielmi, Wirth and Zennaro (2005) and Guglielmi and Protasov (2013) - to a polytope Barabanov norm.
Hence, the existence of a polytope Barabanov norm has the same genericity of an extremal polytope norm.
Moreover, we extend the result to polytope antinorms, which have been recently introduced
to compute the lower spectral radius of a finite family of matrices having an invariant cone
An antinorm theory for sets of matrices: Bounds and approximations to the lower spectral radius
Full text linkFor the computation of the lower spectral radius of a finite family of matrices that shares an invariant cone, two recent papers by Guglielmi and Protasov [8] and Guglielmi and Zennaro [9] make use of so-called antinorms. Antinorms are continuous, nonnegative, positively homogeneous and superadditive functions defined on the cone and turn out to be related to the lower spectral radius of the family in a similar way as norms are related to the joint spectral radius. In this paper, we revisit the theory of antinorms in a systematic way, filling in some theoretical holes, correcting a common mistake present in the literature and adding some new properties and results. In particular, we prove that, under suitable assumptions, the lower spectral radius is characterized by a Gelfand type limit computed on an antinorm
Sulla prima attività di Gregorio Guglielmi
No full textSulla prima attività di Gregorio Guglielmi
La ricerca condotta dall’autore nelle chiese e archivi di Roma e di Praga ha prodotto una nuova conoscenza sulla prima attività del pittore romano Gregorio Guglielmi. Dopo un inizio come incisore (1734), egli fu incaricato da vari ordini religiosi (Gesuiti, Oratoriani, Servi di Maria, Agostiniani), di eseguire alcune pale d’altare e altre opere a carattere religioso, in parte ancora conservate.
Particolare importanza riveste la sconosciuta commissione della tela dell’altare maggiore della chiesa degli Agostiniani a Praga e di una per un altare laterale della stessa chiesa nel 1739, di cui si pubblicano inediti documenti in appendice. L’autore ha anche identificato una tela ed un affresco inediti di Guglielmi nel palazzo del Commendatore dell’Ospedale di Santo Spirito in Saxia eseguiti poco prima del 1750.Contribution to the early activity of Gregorio Guglielmi
The article derives from a research carried out by the author in the churches and archives of Rome and Prague and throws fresh light on some aspects of the early work of the Roman painter Gregorio Guglielmi. It analyses at first some of Guglielmi’s experiments in the field of engraving (1734) and afterwards the various altarpieces commissioned to him by religious orders (Jesuits, Oratorians, Servants of Mary, Augustinians). Some of this works still survive and can partially be reconstructed through indirect testimonies.
In particular, the commission of the altarpiece of the Augustinians' church in Prague and another commission of 1739 for a side altar in the same church are investigated. The relevant unedited documents are to be found in the appendix. The author has also identified a canvas and a fresco by Guglielmi in the Palazzo del Commendatore of the Hospital of Santo Spirito in Saxia in Rome, performed shortly before the middle of the century
The favourite songs in the comic opera le Pazzie d'Orlando by Signor Guglielmi
No full textTitre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [Le pazzie d'Orlando]Appartient à l’ensemble documentaire : RISMImpOpéras -- +* 1700......- 1799......+:18e siècle
Canonical construction of polytope Barabanov norms and antinorms for sets of matrices
Full text linkBarabanov norms have been introduced in Barabanov (Autom. Remote Control, 49 (1988), pp. 152–157) and constitute an important instrument in analyzing the joint spectral radius of a family of matrices and related issues. However, although they have been studied extensively, even in very simple cases it is very difficult to construct them explicitly (see, e.g., Kozyakin (Discrete Contin. Dyn. Syst. Ser. B, 14 (2010), pp. 143–158)). In this paper we give a canonical procedure to construct them exactly, which associates a polytope extremal norm—constructed by using the methodologies described in Guglielmi, Wirth, and Zennaro (SIAM J. Matrix Anal. Appl., 27 (2005), pp. 721–743) and Guglielmi and Protasov (Found. Comput. Math., 13 (2013), pp. 37–97)—to a polytope Barabanov norm. Hence, the existence of a polytope Barabanov norm has the same genericity of an extremal polytope norm. Moreover, we extend the result to polytope antinorms, which have been recently introduced to compute the lower spectral radius of a finite family of matrices having an invariant cone
Replication Data for: Addressing Migrant Inequality in Youth Political Engagement: The Role of Parental Influences, Politics and Governance
No full textSyntax and associate dataset are provided to replicate the analyses employed in article no. 9282, published by Politics and Governance (2025, volume 13): "Addressing Migrant Inequality in Youth Political Engagement: The Role of Parental Influences". Authors: Simona Guglielmi and Nicola Maggini.
The dataset "MAYBE_replication_PaG_9282.dta" is provided solely for replication purposes. It cannot be shared or employed for other purposes until the public release of the full Maybe research project's dataset. The labels of the original variables are in Italian. Data codes related to students, classrooms, and schools are anonymized. The names of the municipalities in the original variable "SC_DESCRIZIONECOMUNE" have been replaced with numbers to ensure full data anonymity
[L'Impostore punito / Pietro Alessandro Guglielmi]
No full textTitre uniforme : Guglielmi, Pietro Alessandro (1728-1804). Compositeur. [I Finti amori]Titre pris au dos de la reliure. - Commedia per musica en 2 actes, connue également sous le titre de "I Finti amori". - Librettiste non identifié. - 1re représentation : Naples, Théâtre dei Fiorentini, été 1784. - Rôles : Madame (Ut 1), Bastiano (Fa 4), Filindo (Ut 1), Gioconda (Ut 1), Pancrazio (Fa 4), Zoroastro (Fa 4), Placida (Ut 1). - Vl 2, vla 2, b, fl 2, ob 2, cor 2 (en do, ré, mi bémol, fa, sol, la, si bémol). - Ratures, collettes. - Plusieurs mains de copistes. - Pagination au crayon d'une main plus tardive. - Identifié grâce à RISM A/II 850.008.553Présentation musicale : [Partition]Incipit : E perche fra pochi istanti (introduzione)Appartient à l’ensemble documentaire : RISM2Appartient à l’ensemble documentaire : RISMMssOpéras -- +* 1700......- 1799......+:18e siècle
Elathous chiarae Guglielmi & Platia 1985
No full text<i>Elathous chiarae</i> Guglielmi & Platia <p>(Fig. 3G)</p> <p> <i>Elathous chiarae</i> Guglielmi & Platia, 1985: 192.</p> <p> <b>Type depository</b>. Holotype, male (PCAG?); paratype, male (MCSN).</p> <p> <b>Type locality</b>. Greece: Peloponnese, Mt. Taygetos, 1700–1900 m.</p> <p> <b>Distribution</b>. Greece.</p> <p> <b>Literature</b>. Guglielmi & Platia (1985: 185, 192, 213): original description and figures; Cate (2007: 164): catalogue; Etzler (2019: 306): checklist.</p> <p> Remark. According to the original description (Guglielmi & Platia 1985), the holotype of <i>E. chiarae</i> should be deposited in MCSN, Verona, Italy, and the paratype in the collection of the collector and co-author of this species, Alfredo Guglielmi (Verona, Italy). However, only the paratype is deposited in the MCSN (Roberta Salmaso, personal communication), and therefore, we assume that the holotype is in the collection of A. Guglielmi.</p>Published as part of <i>Kundrata, Robin, Németh, Tamás, Prosvirov, Alexander S. & Hoffmannova, Johana, 2021, Annotated catalogue of the click-beetle genus Elathous Reitter, 1890 (Coleoptera Elateridae: Dendrometrinae), including habitus photographs for all species, pp. 231-265 in Zootaxa 4995 (2)</i> on page 242, DOI: 10.11646/zootaxa.4995.2.2, <a href="http://zenodo.org/record/5056397">http://zenodo.org/record/5056397</a>
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