Double Marking Revisited

The Schorr-Waite Marking Algorithm Revisited

There has been a recent wave of interest [2,4,5,13] in proving the correctness of Schorr and Waite’s [lo] algorithm for making all the nodes in a directed graph that are accessible from a given node (see also 171). In this paper we show how, by developing that algorithm in a systematic manner (along the lines of [8]) from the standard depth-first search paradigm (see, for example, [ 12]), a sim...

Double subject marking in L2 Montreal French

Double Pouch Colon Revisited

A 3-day-old term male child weighing 2.1 Kg, born by spontaneous vaginal delivery, was admitted with complaints of abdominal distention, meconuria and absent anal opening. This was the first child of the couple who had a non-consanguineous marriage. On examination, there was abdominal distention, poorly developed gluteal folds and an absent anal opening. Plain X-ray abdomen showed two large air...

Double Description Method Revisited

The double description method is a simple and useful algorithm for enumerating all extreme rays of a general polyhedral cone in IR d , despite the fact that we can hardly state any interesting theorems on its time and space complexities. In this paper, we reinvestigate this method, introduce some new ideas for eecient implementations, and show some empirical results indicating its practicality ...

Double charm hadrons revisited

The dynamics of two heavy quarks inside the same hadron is probed against the double charm baryon results of SELEX. This can be seen as a part of the mechanism to bind tetraquarks with two heavy quarks and two light antiquarks. In the framework of potential models, it is possible to test the role of different effects: relativistic corrections, confinement, hyperfine forces, etc. It is conjectur...