External Path Length -- from Wolfram MathWorld

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.

Path Graph -- from Wolfram MathWorld

GATE 1991 CS/IT, WEIGHTED EXTERNAL PATH LENGTH OF BINARY TREE 🎄🌲🌴🌳, DATA STRUCTURES

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Path Polynomial -- from Wolfram MathWorld

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Angle Bisector -- from Wolfram MathWorld

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Chromatic Invariant -- from Wolfram MathWorld

Chromatic Invariant -- from Wolfram MathWorld

Huffman Coding -- from Wolfram MathWorld

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