BPE

Byte-Pair Encoding (BPE) and Modern Subword Tokenization: Mathematical Foundations, Merge Dynamics, Byte-Level Encodings, and Vocabulary Compression Mechanics

Byte-Pair Encoding (BPE) and Modern Subword Tokenization: Mathematical Foundations, Merge Dynamics, Byte-Level Encodings, and Vocabulary Compression Mechanics Tokenization is the discrete boundary interface between raw textual sequences and the continuous vector representations of autoregressive large language models. Before an attention block computes a single inner product or a feed-forward network applies an activation function, an input string must be mapped into an ordered sequence of disc