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Microwave Transistor Amplifier,We consider the problem of placing arrow heads in directed graph drawings without them overlapping other drawn objects. This gives drawings where edge directions can be deduced unambiguously. We show hardness of the problem, present exact and heuristic algorithms, and report on a practical study.

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Graph Drawing and Network Visualization978-3-319-50106-2Series ISSN 0302-9743 Series E-ISSN 1611-3349