Leading Up to the Pencil

The linear pencil approach to rational interpolation

It is possible to generalize the fruitful interaction between (real or complex) Jacobi matrices, orthogonal polynomials and Padé approximants at infinity by considering rational interpolants, (bi-)orthogonal rational functions and linear pencils zB − A of two tridiagonal matrices A, B, following Spiridonov and Zhedanov. In the present paper, beside revisiting the underlying generalized Favard t...

Severe neonatal hyperbilirubinemia leading to exchange transfusion

  Background :Severe neonatal hyperbilirubinemia is associated with significant morbidity and mortality. This study was conducted to investigate the causes of severe hyperbilirubinemia leading to Exchange Transfusion (ET) from March 2009 to March 2011 in Bahrami children hospital, Tehran, Iran in order to establish guidelines to prevent profound jaundice & ET.   Methods : 94 neonates underwent ...

The vision for Pencil

The document is an attempt at defining the concept behind the Pencil project. It is designed to serve as a reference and guideline for contributors of the Pencil project. I will revise it as it becomes necessary during the evolution of the project and following discussions with contributors and users of Pencil. It is currently based on my original vision and discussions with Oluseyi Sonaiya and...

Genomic Analysis of the Process Leading up to the Extinction of the Woolly Mammoth

Assess the Main Factors Leading to the Break-up of the Soviet Union

It has been observed in the past that, at the time of Mikhail Gorbachëv‟s ascension to power following the death of his predecessor Konstantin Chernenko in 1985, few people believed that the Soviet Union was heading for collapse; merely reform (Bartlett, R. (2005:278)). Thus the question begs; what changed over the next five years to bring one of the world‟s two superpowers to the point of utte...