Search results for " Geometry."

Spectral sequence associated with a symplectic manifold

2006

A method of computation of its terms is presented together with some stabilization results. As an application a characterization of symplectic harmonic manifolds is given and a relationship with the C-spectral sequence is indicated.

Analitiskā ģeometrija telpā: lekcijas lasītas Latvijas Universitātes Inženierzinātņu un mehanikas fakultātēs

1931

Analītiskā ģeometrija: 2. daļa, Analītiskā ģeometrija plāksnē

1941

Lekcijas lasītas Fizikas-matematikas fakultātes studentiem 1940./41.g.

Schul-Stereometrie

1883

Vektoru rēķini

1942

Modernās elementārās algebras un ģeometrijas elementi matemātikas skolotājiem

2020

Grāmata paredzēta studiju kursa “Modernās elementārās algebras un ģeometrijas elementi” (4 kredītpunkti) apguvei integrētās profesionālās bakalaura studiju programmas “Skolotājs” studentiem. Tajā iekļauts teorijas materiāls, uzdevumu piemēri un uzdevumi ar atrisinājumiem patstāvīgajam darbam. Materiālu var izmantot arī matemātikas skolotāji mācību procesā, gatavojot vidusskolēnus matemātikas olimpiādēm.

Fuzzy Logic Based Mathematical Structures and Their Applications: Book of Abstracts, 16th of March 2023, Jelgavas street 3, Riga

2023

Genesi geometrica delle volte centriche

1996

Un'analisi completa degli organismi voltati comporta lo studio delle molteplici componenti necessarie alla loro definizione: configurazione geometrica, sistema costruttivo, area storico-geografica di appartenenza, interpretazioni Stilistiche. L’obiettivo di questo studio è indirizzato all' analisi delle volte continue su pianta centrica definibili attraverso le leggi della geometria euclidea. L’indagine si pone all'interno dei confini relativi alla loro configurazione geometrica e il criterio adottato, svincolato da classificazioni di carattere tipologico o stilistico, propone l'identificazione di famiglie geometriche in base alla figura del poligono di base dell'impianto. Si può identifica…

Anisotropy and chemical composition of ultra-high energy cosmic rays using arrival directions measured by the Pierre Auger Observatory

2011

The Pierre Auger Collaboration has reported evidence for anisotropy in the distribution of arrival directions of the cosmic rays with energies $E>E_{th}=5.5\times 10^{19}$ eV. These show a correlation with the distribution of nearby extragalactic objects, including an apparent excess around the direction of Centaurus A. If the particles responsible for these excesses at $E>E_{th}$ are heavy nuclei with charge $Z$, the proton component of the sources should lead to excesses in the same regions at energies $E/Z$. We here report the lack of anisotropies in these directions at energies above $E_{th}/Z$ (for illustrative values of $Z=6,\ 13,\ 26$). If the anisotropies above $E_{th}$ are du…

On the arithmetic and geometry of binary Hamiltonian forms

2011

Given an indefinite binary quaternionic Hermitian form $f$ with coefficients in a maximal order of a definite quaternion algebra over $\mathbb Q$, we give a precise asymptotic equivalent to the number of nonequivalent representations, satisfying some congruence properties, of the rational integers with absolute value at most $s$ by $f$, as $s$ tends to $+\infty$. We compute the volumes of hyperbolic 5-manifolds constructed by quaternions using Eisenstein series. In the Appendix, V. Emery computes these volumes using Prasad's general formula. We use hyperbolic geometry in dimension 5 to describe the reduction theory of both definite and indefinite binary quaternionic Hermitian forms.