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An Attempt at Stemmatic Classification of Manuscripts of the Tale of GenjiUsing Kana Ngrams
Tetsuya Saito (College of Business Administration, Shukutoku University)
In this paper, I report the results of an experiment at stemmatic classification, using kana Ngrams to analyze textual and orthographic variations between multiple manuscripts of individual chapters within the Tale of Genji. Classification results were obtained for several selected short-length chapters using Ngrams of 3~5 grams. Theresults for manuscripts of these chapters showed that (1) the method was able to identify which stemma (Aobyoshi-bon or Kawachi-bon) a given chapter belonged to, and that (2) stemmatic classification was easier for some chapters of the work than for others. Furthermore, a comparison of these results with stemmaticclassification results obtained by literary and philological methods of research showed that the conclusions reached were identical, suggesting that the method used in this experiment may have a certain degree of validity.
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は移調関係にあるもの(例えば長三和音「C, E,
G」と「D, F♯, A」は同じ PC セット {0, 4, 7}に還元される)を同一視した.こうした操作により,局所的に厳密な分析を行なう際に必要な情報は失われるが,逆にそのことで,様々な調性や拍子等の楽曲に対して大局的に俯瞰することが可能になる.和声と旋律の関係についても留意しなくてはならない.もともと旋律とはリズムとピッチの時間的な配置で表現されるもので,ピッチの面で和声と不可分な関係にある.古典的には,旋律のみに固有なピッチを持つ音を,非和声音として和声を構成する和声音と区別してきた.しかし,非和声音の特定方法は曖昧で一意ではない.PCセットでは,和声音と非和声音の区別はせず,出現するすべてのピッチを等しく考慮するため,旋律の要素も含まれている.
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