Sume calculabile prin serii de puteri

Sume calculabile prin serii de puteri

Date: 2004
Creator: Anghel, Nicolae
Description: This article investigates an efficient way of evaluating sums and series, based on a result of Abel applied to associated power series.
Contributing Partner: UNT College of Arts and Sciences
Asupra sumelor de puteri asemenea

Asupra sumelor de puteri asemenea

Date: February 2005
Creator: Anghel, Nicolae
Description: Article addressing, from a historical perspective, Newton's sums of like powers of natural numbers.
Contributing Partner: UNT College of Arts and Sciences
O generalizare a problemei piesei de 5 lei a lui Ţiţeica

O generalizare a problemei piesei de 5 lei a lui Ţiţeica

Date: November 2012
Creator: Anghel, Nicolae
Description: The '5 lei coin' problem of Titeica is generalized to circles of arbitrary radii.
Contributing Partner: UNT College of Arts and Sciences
O demonstratie directă a faptului că L1 (X, B, μ) verifică principiul tare al maximului modulului

O demonstratie directă a faptului că L1 (X, B, μ) verifică principiul tare al maximului modulului

Date: 1989
Creator: Anghel, Nicolae
Description: Article proposing a new direct proof of the fact that L^1 verifies the strong maximum principle, i.e., any analytic map from the complex unit disk into L^1, constant in norm, must be constant.
Contributing Partner: UNT College of Arts and Sciences
Generalizarea problemei 0:59

Generalizarea problemei 0:59

Date: 1980
Creator: Anghel, Nicolae
Description: This note extends a certain combinatorics problem of I. Tomescu.
Contributing Partner: UNT College of Arts and Sciences
Legătura dintre sumele Stieltjes şi sumele simetrice elementare

Legătura dintre sumele Stieltjes şi sumele simetrice elementare

Date: February 2012
Creator: Anghel, Nicolae
Description: Article discussing studies of the relationship between the Stieltjes sums and the elementary symmetric sums.
Contributing Partner: UNT College of Arts and Sciences
Projecting on polynomial solutions of second order partial differential operators

Projecting on polynomial solutions of second order partial differential operators

Date: June 2007
Creator: Anghel, Nicolae
Description: Article discussing projecting on polynomial solutions of second order partial differential operators.
Contributing Partner: UNT College of Arts and Sciences
Projecting on Polynomial Dirac Spinors

Projecting on Polynomial Dirac Spinors

Date: June 2006
Creator: Anghel, Nicolae
Description: In this paper, the authors adapt Axler and Ramey's method of constructing the harmonic part of a homogeneous polynomial to the Fischer decomposition associated to Dirac operators acting on polynomial spinors.
Contributing Partner: UNT College of Arts and Sciences
On Bär's Conformal Lower Bound for the Spectrum of Generalized Dirac Operators

On Bär's Conformal Lower Bound for the Spectrum of Generalized Dirac Operators

Date: 2000
Creator: Anghel, Nicolae
Description: Article discussing Bär's conformal lower bound for the spectrum of generalized Dirac operators.
Contributing Partner: UNT College of Arts and Sciences
Varietăţi Grassmanniene Mixte

Varietăţi Grassmanniene Mixte

Date: 1982
Creator: Anghel, Nicolae
Description: This article discusses mixed Grassmann manifolds. Abstract: Se construieşte varietea grassmanniană modelată intr-un spaţiu Banach mixt, situaţie ce generalizează simultan conceptele grassmanniene real şi complex.
Contributing Partner: UNT College of Arts and Sciences
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