A directed acyclic graph or DAG is a data modeling or structuring ... ‘tips’ or transactions to build on based on accumulated weight (or the number of confirmations leading up to the tip).

What is DAG? DAG is a directed graph data structure that uses a topological ordering. The sequence can only go from earlier to later. DAG is often applied to problems related to data processing ...

In this thesis, we study sampling and weighted counting of bipartite matchings and directed acyclic graphs (DAGs). The total weight of perfect matchings of a bipartite graph equals the permanent of ...