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by primitivesuave 4633 days ago
It depends, when I worked at a big company that produced a CAS (computer algebra system) they had an entire team for building graph theory ideas into the software. When I worked at a startup working on urban traffic congestion, there was just one guy who had done some surface-level reading one weekend on max-flow-min-cut and some basic algorithms. Knowing graph theory definitely helped me get that startup job (and take over as "the graph theory guy")