Search results for "VILI"

showing 10 items of 515 documents

Appealing to the enemy, breaking boundaries

2019

Lettura critica del volume di Giovanni Ricci, Appeal to the Turk. The broken boundaries of the Renaissance (Viella, Rome, 2018, pp. 190) Critical comment of the book: Giovanni Ricci, Appeal to the Turk. The broken boundaries of the Renaissance (Viella, Rome, 2018, pp. 190)

Settore M-STO/02 - Storia ModernaRenaissance Italian States Ottoman Empire frontier civilisationsRinascimento Stati italiani impero ottomano frontiera civiltà

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Sotto il giogo dei liberatori: Memoria individuale contro retorica pubblica: “guerra totale” e liberazione nel Lazio meridionale (1943-1944), in «Zap…

2003

Settore M-STO/04 - Storia Contemporaneaguerra memoria violenza sui civili bombardamenti alleati

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Shock formation in the dispersionless Kadomtsev-Petviashvili equation

2016

The dispersionless Kadomtsev-Petviashvili (dKP) equation $(u_t+uu_x)_x=u_{yy}$ is one of the simplest nonlinear wave equations describing two-dimensional shocks. To solve the dKP equation we use a coordinate transformation inspired by the method of characteristics for the one-dimensional Hopf equation $u_t+uu_x=0$. We show numerically that the solutions to the transformed equation do not develop shocks. This permits us to extend the dKP solution as the graph of a multivalued function beyond the critical time when the gradients blow up. This overturned solution is multivalued in a lip shape region in the $(x,y)$ plane, where the solution of the dKP equation exists in a weak sense only, and a…

Shock formationFOS: Physical sciencesGeneral Physics and AstronomyKadomtsev–Petviashvili equation01 natural sciencesCritical point (mathematics)010305 fluids & plasmasDissipative dKP equation[ MATH.MATH-AP ] Mathematics [math]/Analysis of PDEs [math.AP]Mathematics - Analysis of PDEsMethod of characteristicsPosition (vector)[MATH.MATH-MP]Mathematics [math]/Mathematical Physics [math-ph]0103 physical sciencesFOS: Mathematics[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP]0101 mathematicsSettore MAT/07 - Fisica MatematicaMathematical PhysicsMathematical physicsMathematicsCusp (singularity)Multiscales analysisdispersionless Kadomtsev-Petviashvili equation; dissipative dKP equation; multiscales analysis; shock formationPlane (geometry)Multivalued functionApplied Mathematics010102 general mathematics[ MATH.MATH-MP ] Mathematics [math]/Mathematical Physics [math-ph]Statistical and Nonlinear PhysicsMathematical Physics (math-ph)Nonlinear Sciences::Exactly Solvable and Integrable SystemsDispersionless Kadomtsev-Petviashvili equationDissipative systemAnalysis of PDEs (math.AP)

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Numerical study of the Kadomtsev–Petviashvili equation and dispersive shock waves

2018

A detailed numerical study of the long time behaviour of dispersive shock waves in solutions to the Kadomtsev-Petviashvili (KP) I equation is presented. It is shown that modulated lump solutions emerge from the dispersive shock waves. For the description of dispersive shock waves, Whitham modulation equations for KP are obtained. It is shown that the modulation equations near the soliton line are hyperbolic for the KPII equation while they are elliptic for the KPI equation leading to a focusing effect and the formation of lumps. Such a behaviour is similar to the appearance of breathers for the focusing nonlinear Schrodinger equation in the semiclassical limit.

Shock waveBreatherGeneral MathematicsGeneral Physics and AstronomySemiclassical physicsFOS: Physical sciencesPattern Formation and Solitons (nlin.PS)Kadomtsev–Petviashvili equation01 natural sciences010305 fluids & plasmassymbols.namesakeMathematics - Analysis of PDEs[ MATH.MATH-AP ] Mathematics [math]/Analysis of PDEs [math.AP]0103 physical sciencesModulation (music)FOS: Mathematics[MATH.MATH-AP]Mathematics [math]/Analysis of PDEs [math.AP]Mathematics - Numerical Analysis0101 mathematicsSettore MAT/07 - Fisica MatematicaNonlinear Schrödinger equationNonlinear Sciences::Pattern Formation and SolitonsLine (formation)PhysicsKadomtsev-Petviashvili equationKadomtsev Petviashvili equatuonNonlinear Sciences - Exactly Solvable and Integrable SystemsDispersive Shock waves010102 general mathematicsGeneral EngineeringNumerical Analysis (math.NA)Dispersive shock waves[ MATH.MATH-NA ] Mathematics [math]/Numerical Analysis [math.NA]Whitham equationsNonlinear Sciences - Pattern Formation and SolitonsLumpsKadomtsev Petviashvili equation dispersive shock wavesClassical mechanicsNonlinear Sciences::Exactly Solvable and Integrable SystemssymbolsSolitonExactly Solvable and Integrable Systems (nlin.SI)[MATH.MATH-NA]Mathematics [math]/Numerical Analysis [math.NA]Kadomtsev Petviashvili equationAnalysis of PDEs (math.AP)

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La battaglia di Himera (480 a.C.) nelle inerpretazioni storiografiche antiche e nelle moderne riletture di G. Grote ed E.A. Freeman

2014

Il sincronismo tra le battaglie di Himera e Salamina è stato codificato dalla storiografia antica con l’intento di unificare la Grecità, metropolitana e occidentale, nella comune celebrazione della vittoria contro il barbaro: un nome che accomuna indistintamente Cartaginesi e Persiani. Le due vittorie vennero interpretate tout court come un trionfo della civiltà sulla barbarie. Su questa stessa linea interpretativa si sono mosse alcune analisi della storiografia moderna (XIX-XX sec.) anch’esse caratterizzate da forti connotazioni ideologiche. L’attenzione si sofferma in particolare sulle riletture che degli eventi del 480 a.C. hanno dato G. Grote ed E. A. Freeman; nei loro lavori è possibil…