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Legătura dintre sumele Stieltjes şi sumele simetrice elementare (open access)

Legătura dintre sumele Stieltjes şi sumele simetrice elementare

Article discussing studies of the relationship between the Stieltjes sums and the elementary symmetric sums.
Date: February 2012
Creator: Anghel, Nicolae
System: The UNT Digital Library
O generalizare a problemei piesei de 5 lei a lui Ţiţeica (open access)

O generalizare a problemei piesei de 5 lei a lui Ţiţeica

The '5 lei coin' problem of Titeica is generalized to circles of arbitrary radii.
Date: November 2012
Creator: Anghel, Nicolae
System: The UNT Digital Library
O demonstratie directă a faptului că L1 (X, B, μ) verifică principiul tare al maximului modulului (open access)

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

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.
Date: 1989
Creator: Anghel, Nicolae
System: The UNT Digital Library
Generalizarea problemei 0:59 (open access)

Generalizarea problemei 0:59

This note extends a certain combinatorics problem of I. Tomescu.
Date: 1980
Creator: Anghel, Nicolae
System: The UNT Digital Library
Asupra sumelor de puteri asemenea (open access)

Asupra sumelor de puteri asemenea

Article addressing, from a historical perspective, Newton's sums of like powers of natural numbers.
Date: February 2005
Creator: Anghel, Nicolae
System: The UNT Digital Library
Sume calculabile prin serii de puteri (open access)

Sume calculabile prin serii de puteri

This article investigates an efficient way of evaluating sums and series, based on a result of Abel applied to associated power series.
Date: 2004
Creator: Anghel, Nicolae
System: The UNT Digital Library
Varietăţi Grassmanniene Mixte (open access)

Varietăţi Grassmanniene Mixte

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.
Date: 1982
Creator: Anghel, Nicolae
System: The UNT Digital Library
Asupra structurii grupurilor abeliene finite (open access)

Asupra structurii grupurilor abeliene finite

Article presenting a direct elementary proof to a classical result regarding the structure of finite abelian groups as products of descending cyclic groups.
Date: 2007
Creator: Anghel, Nicolae
System: The UNT Digital Library
Asupra unei probleme de loc geometric a lui A. Dafina (open access)

Asupra unei probleme de loc geometric a lui A. Dafina

Article generalizing a certain geometric locus problem due to A. Dafina.
Date: 2003
Creator: Anghel, Nicolae
System: The UNT Digital Library