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#EL30 Graphing

Week 3 of Stephen Downes' E-Learning 3.0 course is looking at Graphs. Stephen recommended some resources for this topic. These included: Vaidehi Joshi's (2017) gentle introduction to graph theory. In her discussion of graphs, Vaidehi observes "in mathematics, graphs are a way to formally represent a network, which is basically just a collection of objects that are all interconnected".  She distinguishes between directed graphs and undirected graphs and explains the ways edges connect nodes in these kind of graphs. An example of the former is Twitter (each edge created represents a one-way relationship), and of the latter Facebook (its edges are...