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7 papers · 1 filter
Hopf bifurcation in a dynamic IS-LM model with time delay
Mihaela Neamtu, Dumitru Opris, Constantin Chilarescu
In this paper we investigate the impact of delayed tax revenues on the fiscal policy out-comes. Choosing the delay as a bifurcation parameter we study the direction and the stabili…
Openness and convexity for momentum maps
Petre Birtea, Juan-Pablo Ortega, Tudor S. Ratiu
The purpose of this paper is finding the essential attributes underlying the convexity theorems for momentum maps. It is shown that they are of topological nature; more specificall…
A Dynamic P53-MDM2 Model with Time Delay
Gh. I. Mihalas, M. Neamtu, D. Opris +1
Specific activator and repressor transcription factors which bind to specific regulator DNA sequences, play an important role in gene activity control. Interactions between genes c…
Two-photon width of the Higgs boson
K. Moenig, A. Rosca
This study investigates the potential of a photon collider for measuring the two photon partial width times the branching ratio of a light Higgs boson. The analysis is based on the…
The leader operators of the -dimensional relativistic rotating oscillators
Ion I. Cotăescu, Nicolina Pop
The main pairs of leader operators of the quantum models of relativistic rotating oscillators in arbitrary dimensions are derived. To this end one exploits the fact that these mode…
Remarks on a five-dimensional Kaluza-Klein theory of the massive Dirac monopole
Ion I. Cotăescu
The Gross-Perry-Sorkin spacetime, formed by the Euclidean Taub-NUT space with the time trivially added, is the appropriate background of the Dirac magnetic monopole without an expl…