1,168,091 research outputs found
On spectral measures for certain unitary representations of R. Thompson's group F
No full textThe Hilbert space H of backward renormalisation of an anyonic quantum spin chain affords a unitary representation of Thompson’s group F via local scale transformations. The group F is discrete and mysterious in many ways so the obvious questions of irreducibility and distinctness of these representations appear difficult and in a first step towards solving them we calculate the spectral measures of group elements in the representation. Given a vector in the canonical dense subspace of H we calculate the corresponding spectral measure and illustrate with some examples. To do this calculation we introduce the “essential part” (intimately related to the conjugacy class) of an element. The spectral measure for any vector in H is, apart from possibly finitely many eigenvalues, absolutely continuous with respect to
Lebesgue measure. The same considerations and results hold for the Brown-Thompson groups Fn (for which F = F2)
Gray / Entw. u. gez. v. F. Handke ; Situation u. Schrift gest. v. F. Kunzer, Berge v. F. Eitner
No full textGRAY / ENTW. U. GEZ. V. F. HANDKE ; SITUATION U. SCHRIFT GEST. V. F. KUNZER, BERGE V. F. EITNER
G. D. Reymann's topographische Special-Karte von Central-Europa (-)
Gray / Entw. u. gez. v. F. Handke ; Situation u. Schrift gest. v. F. Kunzer, Berge v. F. Eitner (280) ( -
Visoko / Schrift u. Gerippe v. Feldw. Spaczek ; Terrainschraffirung v. Hauptm. F. Musić u. F. Zboźen
No full textVISOKO / SCHRIFT U. GERIPPE V. FELDW. SPACZEK ; TERRAINSCHRAFFIRUNG V. HAUPTM. F. MUSIĆ U. F. ZBOŹEN
Specialkarte der K. u. K. Österreichisch-Ungarischen Monarchie (-)
Visoko / Schrift u. Gerippe v. Feldw. Spaczek ; Terrainschraffirung v. Hauptm. F. Musić u. F. Zboźen ([6460]=Zone 30 Col. 18) ( -
1947 V. F. W. Invitation
No full textInvitation for Louis-Philippe Gagné to attend the installation of officers at V. F. W. Frank W. Hulett Post No. 1603.https://digitalcommons.usm.maine.edu/fac-lpg-1947-04-06/1019/thumbnail.jp
Krasnystaw / Entw. u. gez. v. F. Handke ; Schrift v. F. Kunzer, Berge v. H. Müller
No full textKRASNYSTAW / ENTW. U. GEZ. V. F. HANDKE ; SCHRIFT V. F. KUNZER, BERGE V. H. MÜLLER
G. D. Reymann's topographische Special-Karte von Central-Europa (-)
Krasnystaw / Entw. u. gez. v. F. Handke ; Schrift v. F. Kunzer, Berge v. H. Müller (135D) ( -
Leptonic decay constants f(K), f(D), and f(Ds) with N-f=2+1+1 twisted-mass lattice QCD
No full textWe present a lattice QCD calculation of the pseudoscalar decay constants f(K), f(D) and f(Ds) performed using the gauge configurations produced by the European Twisted Mass Collaboration with N-f = 2 + 1 + 1 dynamical quarks, which include in the sea, besides two light mass degenerate quarks, also the strange and charm quarks with masses close to their values in the real world. The simulations are based on a unitary setup for the two light mass-degenerate quarks and on a mixed action approach for the strange and charm quarks. We use data simulated at three different values of the lattice spacing in the range 0.06-0.09 fm and at pion masses in the range 210-450 MeV. Our main results are f(K+)/f(pi+) = 1.184(16), f(K+) = 154.4(2.0) MeV, which incorporate the leading strong isospin breaking correction due to the up and down quark mass difference, and f(K) = 155.0(1.9) MeV, f(D) = 207.4(3.8) MeV, f(Ds) = 247.2(4.1) MeV, f(Ds)/f(D) = 1.192(22) and (f(Ds)/f(D))/(f(K)/f(pi)) = 1.003(14) obtained in the isospin symmetric limit of QCD. Combined with the experimental measurements of the leptonic decay rates of kaon, pion, D and D-s mesons our results lead to the following determination of the Cabibbo-Kobayashi-Maskawa (CKM) matrix elements: vertical bar V-us vertical bar = 0.2269(29), vertical bar V-cd vertical bar = 0.2221(67) and vertical bar V-cs vertical bar = 1.014(24). Using the latest value of vertical bar V-ud vertical bar from superallowed nuclear beta decays the unitarity of the first row of the CKM matrix is fulfilled at the per mill level
Group photograph with James V. Bennett and Robert F. Kennedy
No full textA b/w photograph with James V. Bennett, Attorney General Robert F. Kennedy, presumably Assistant Attorney General Lee Lovinge, and five other men at the Attorney General's Office
Vitamin-V: Virtual Environment and Tool-boxing for Trustworthy Development of RISC-V based Cloud Services
No full textVitamin-V is a 2023-2025 Horizon Europe project that aims to develop a complete RISC-V open-source software stack for cloud services with comparable performance to the cloud-dominant x86 counterpart and a powerful virtual execution environment for software development, validation, verification, and test that considers the relevant RISC-V ISA extensions for cloud deployment
Exit-Pool
No full textInternational Ideas Competition Man made reformulate. 4th International Architecture Triennale 2010, Oslo. Project "Exit-Pool" with: F. Marullo, F. Perugini, G. Sponzilli, V. Signore. Second prize with honorable mention
Photograph of James V. Bennett and Robert F. Kennedy
No full textA b/w group photograph of James V. Bennett, Attorney General Robert F. Kennedy, possibly Assistant Attorney General Lee Lovinger, and one other man at the Attorney General's Office
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