A 3-manifold with marked boundary is a pair (M, X), where M is a compact 3-manifold whose (possibly empty) boundary is made up of tori and Klein bottles, and X is a trivalent graph that is a spine of ∂M . A standard skeleton of a 3-manifold with marked boundary (M, X) is a standard sub-polyhedron P of M such that P ∩∂M coincides with X and with ∂P , and such that P ∪ ∂M is a spine of M \ B (whe...

A multiple-partners assignment game with heterogeneous sales and multiunit demands consists of a set of sellers that own a given number of indivisible units of (potentially many di¤erent) goods and a set of buyers who value those units and want to buy at most an exogenously …xed number of units. We de…ne a competitive equilibrium for this generalized assignment game and prove its existence by u...

A linear programming-based heuristic procedure for solving Multiple choice Programming (MCP) problems is presented. Two pivot schemes which may be viewed as the specialized versions of those in “Pivot and Complement”, an &icicnt heuristic by Balas and Martin for pure O-l programming, are inuxporatai into the procedure along with the additional features of cut generation, variable fixing and uch...

Derivations in the minimalist programm (MP) frequently encounter competition between elementary operations. A way in MP to resolve such competitions is to assume preference principles, the most prominent being “Merge before Move” (Chomsky 2000). Assmann, Georgi et al. (2013) discuss competition between Agree and Move. ere, either Agree must be procrastinated in favor of Move or the other way ro...

The notion of genre has received a great deal of attention both in discourse analytic studies as well as in the field of ESP/EAP course design. The present paper has attempted to use genre analysis to account for the rhetorical features of research article introductions written by Iranian academics in two disciplinary fields of Education and Economics. The corpus comprised 40 research article i...

Following Swales’ (1981) definition of genre analysis many scholars have attempted to characterize good academic writing; however, this can be difficult and worrying for non-native writers. Since a well-written abstract encourages readers more effectively, the present study intended to find differences in the rhetorical structures of abstracts by TEFL students from the University of Tehran (UT)...

Progressive Pruning (PP) is used in the Monte-Carlo go playing program Indigo. For each candidate move, PP launches random games starting with this move. PP gathers statistics on moves, and it prunes moves statistically inferior to the best one [5]. This papers yields two new pruning techniques: Miai Pruning (MP) and Set Pruning (SP). In MP the second move of the random games is selected at ran...

In this paper, we propose the necessity to expand the concept of semiformal systems in collaborative environments. We have through extensive empirical work identified a number of salient dimensions that points towards need of broaden the space of possible actions for the users. The complexity of collaborative processes and the trend of increased use of mobile technologies have been concretized ...

An exact formula for the move-to-front rule for self-organizing lists.