Copyright Notice
All papers here are collected from the public domain. The copy-right owned by the original authors or organization. listed here only for convenience of the personal study and not for profit or commercial.
Strictly speaking, some of papers might not allow to republish or post on servers. If true, the paper will be removed from the collection immediately and replaced by the link to the original place where the paper has been downloaded.
The paper collection about DAG ledger, replacing the blockchain structured ledger with a tree or directed acyclic graph (DAG) structures