ReadonlyequalsReadonlyexhaustedReadonlyinitialwhat a node asked for while it is being computed is assumed to hold before its cycle has been iterated
Readonlyroundshow many rounds a cycle gets to settle before all of its nodes answer exhausted
Readonlytransferthe value of a node, asking valueOf for whatever other values it needs
An equation system whose dependencies show only as a node's value is computed, see DemandSolver.