Automatically delete alien nodes when no longer connected to equation node

Dragoon-Lab / topomath

TopoMath: a web-based algebra tutor

http://topomath.asu.edu

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Automatically delete alien nodes when no longer connected to equation node #543

Open vanlehn opened 5 years ago

vanlehn commented 5 years ago

Thus, when studnet sees that DJohn must be merged with DJill, the student clicks on the DJill=RJill*TJill equation node, selects DJohn instead of DJill for the distance slot, and closes the node. Then system deletes DJill alien node.