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The sum over all external (square) nodes of the lengths of the paths from the root of an extended binary tree to each node. For example, in the tree above, the external path length is 25 (Knuth 1997, pp. 399-400). The internal and external path lengths are related by E=I+2n, where n is the number of internal nodes.
ChatGPT Gets Its “Wolfram Superpowers”!—Stephen Wolfram Writings
GATE 1991 CS/IT, WEIGHTED EXTERNAL PATH LENGTH OF BINARY TREE 🎄🌲🌴🌳, DATA STRUCTURES
Path Integral -- from Wolfram MathWorld
ChatGPT Gets Its “Wolfram Superpowers”!—Stephen Wolfram Writings
Heap (data structure) - Wikipedia
Gamma function - Wikipedia
DorogovtsevGoltsevMendesGraph
Computational Foundations for the Second Law of Thermodynamics—Stephen Wolfram Writings
Graph Path -- from Wolfram MathWorld
Perplexity AI still gets simple math wrong despite using Wolfram Alpha : r/perplexity_ai
