Search results for "Simo"
showing 10 items of 459 documents
On the relation between 2+1 Einstein gravity and Chern Simons theory
1999
A simple example is given to show that the gauge equivalence classes of physical states in Chern Simons theory are not in one-to-one correspondence with those of Einstein gravity in three spacetime dimensions. The two theories are therefore not equivalent. It is shown that including singular metrics into general relativity has more, and in fact a quite counter-intuitive, impact on the theory than one naively expects.
Classical Chern–Simons Mechanics
2001
We are interested in a completely integrable Hamiltonian system \((\mathscr{M}_{2N},\omega,H).\) Local coordinates on the 2N-dimensional phase space \(\mathscr{M}_{2N}\) are denoted by η a = (p, q), a = 1, 2, … 2N and the symplectic 2-form ω is given by
Dynamically screened vertex correction to $GW$
2020
Diagrammatic perturbation theory is a powerful tool for the investigation of interacting many-body systems, the self-energy operator $\mathrm{\ensuremath{\Sigma}}$ encoding all the variety of scattering processes. In the simplest scenario of correlated electrons described by the $GW$ approximation for the electron self-energy, a particle transfers a part of its energy to neutral excitations. Higher-order (in screened Coulomb interaction $W$) self-energy diagrams lead to improved electron spectral functions (SFs) by taking more complicated scattering channels into account and by adding corrections to lower order self-energy terms. However, they also may lead to unphysical negative spectral f…
Una convergenza oggettiva tra mafia, terrorismo e forze eversive
2017
«Il vero nodo da sciogliere oggi è perciò quello della mafia inserita nell’attuale sistema di potere. Affrontare questo tema significa entrare nell’ordine di idee di costruire un nuovo sistema di potere, basato veramente sulla democrazia politica e sulla democrazia economica in Sicilia». Così, nel lontano 1964, e in poche sintetiche frasi, Pio La Torre offre ai deputati dell’Assemblea Regionale siciliana una lucida analisi del fenomeno mafioso; nella quale la militanza politica è indisgiungibile da una precisa idea di società e di democrazia. La mafia è un problema politico e della politica; poiché mina alla base il principio di uguaglianza e di giustizia sociale. Lo scontro con i gabelloti…
Al dichosissimo bautismo del padre mossen Francisco Geronymo Simon : a deuocion de Francisca Reig : Octauas
1612
Grav. xil. a port. Sig.: [ ]4
Dialogo entre vnos caminantes de diferentes naciones, que vna noche aportaron juntos a vna venta del Reyno de Valencia, yendo por su deuocion a visit…
1612
Grav. a port. Grav. xil. Sign.: A4
La lascivia delle parole. Beccadelli, Bracciolini e il dibattito sull’Hermaphroditus
2013
La questione della lingua è un nodo centrale del dibattito umanistico del Quattrocento, che si articola principalmente nel «duplice problema dei rapporti fra latino e volgare, e del livello e dei modelli stilistici e lessicali cui la lingua letteraria latina doveva adeguarsi» (Pittaluga, 1995). Il presente saggio affronta la questione ripercorrendo la vivace discussione sollevata nel 1426 dalla pubblicazione dell’irriverente opera del Panormita. In un momento estremamente ricettivo e dinamico dell’umanesimo italiano, gli epigrammi impudichi dell’Hermaphroditus sollevavano la questione dell’imitazione della poesia giocosa e dei generi minori della letteratura antica – oscurati durante il Med…
Monuments à la régence. Représentations sculptées d’Anne d’Autriche et imaginaire du pouvoir
2020
Actes du colloque "La représentation sculpturale du pouvoir. La France, l'Italie et leur rayonnement en Europe à l'époque moderne" organisé par l'Ecole pratique des hautes études et la Société historique et littéraire polonaise, Paris, Bibliothèque polonaise, 17-18 mars 2016; International audience
Rovibrational structure of the Ar–CO complex based on a novel three-dimensional ab initio potential
2002
The first three-dimensional ab initio intermolecular potential energy surface of the Ar–CO van der Waals complex is calculated using the coupled cluster singles and doubles including connected triples model and the augmented correlation-consistent polarized valence quadruple zeta (aug-cc-pVQZ) basis set extended with a (3s3p2d1f1g) set of midbond functions. The three-dimensional surface is averaged over the three lowest vibrational states of CO. Rovibrational energies are calculated up to 50 cm−1 above the ground state, thus enabling comprehensive comparison between theory and available experimental data as well as providing detailed guidance for future spectroscopic investigations of highe…
Study of the benzene⋅N2 intermolecular potential-energy surface
2003
The intermolecular potential-energy surface pertaining to the interaction between benzene and N2 is investigated theoretically and experimentally. Accurate intermolecular interaction energies are evaluated for the benzene–N2 van der Waals complex using the coupled cluster singles and doubles including connected triples [CCSD(T)] method and the aug-cc-pVDZ basis set extended with a set of 3s3p2d1f1g midbond functions. After fitting the energies to an analytic function, the intermolecular Schrödinger equation is solved to yield energies, rotational constants, and Raman-scattering coefficients for the lowest intermolecular levels of several benzene–N2 isotopomers. Experimentally, intermolecula…