An elementary lift of a binary matroid M that arises from coextension can easily be obtained by applying the splitting operation on M. This graphic may not produce matroid. We give method to determine forbidden minors for class matroids such any set k elements is again Using this method, we obtain k=2,3,4. One compute k≥5. As consequence, whose all lifts via coextensions are also graphic. There...

Effectively planning a large multi-track conference requires an understanding of the preferences and constraints of organizers, authors, and attendees. Traditionally, the onus of scheduling the program falls on a few dedicated organizers. Resolving conflicts becomes difficult due to the size and complexity of the schedule and the lack of insight into community members’ needs and desires. Cobi p...

This report gives account of the seminar on Logic Databases and The Meaning of Change, held at the marvelous conference and research center of Dagstuhl, in the last week of September 1996. The seminar attracted a total of 36 invited researchers in the field, from 14 countries. Each of the participants contributed to the seminar by giving talks, demonstrations and/or participating in lively disc...

Creating a schedule for a large multi-track conference requires considering the preferences and constraints of organizers, authors, and attendees. Traditionally, a few dedicated organizers manage the size and complexity of the schedule with limited information and coverage. Cobi presents an alternative approach to conference scheduling by engaging the entire community to take active roles in th...

the set of all non-increasing non-negative integer sequences $pi=(d_1‎, ‎d_2,ldots,d_n)$ is denoted by $ns_n$‎. ‎a sequence $piin ns_{n}$ is said to be graphic if it is the degree sequence of a simple graph $g$ on $n$ vertices‎, ‎and such a graph $g$ is called a realization of $pi$‎. ‎the set of all graphic sequences in $ns_{n}$ is denoted by $gs_{n}$‎. ‎the complete product split graph on $l‎ ...