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Upon constructing the following graph, I expected the node labels to appear as per what is provided. The letter case of Node E is not in CAPS as shown below. Please correct me if I misunderstood something here.

i1

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    $\begingroup$ E is the exponential constant in Mathematica. $\endgroup$
    – kglr
    Aug 13 '18 at 14:26
  • $\begingroup$ @kglr Rookie mistake. Please convert your comment to answer. I shall mark this solved. $\endgroup$ Aug 13 '18 at 14:28
  • $\begingroup$ abhilash, done. $\endgroup$
    – kglr
    Aug 13 '18 at 14:32
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E is a reserved symbol is Mathematica:

enter image description here

enter image description here

Btw, so are C and D.

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