title: What is the reasoning to keep the claim edge after the resource is used?
body: <blockquote>
    <p>Avoidance requires that the system will never enter an unsafe state, so an algorithm must pick a safe sequence of events and processes for execution. One such algorithm is the resource-allocation graph algorithm. A claim edge Pi → Rj indicates that process Pi may request resource Rj which is represented by a dashed line. A claim edge is converted to a request edge when a process requests a resource. When a resource is released by a process, the assignment reconverts to a claim edge. Resources must be claimed a priori in the system.</p>
  </blockquote>
  
  <p>For what reason do we reconvert to a claim edge?</p>