Dybo's law

Dybo's law, or Dybo-Illič-Svityč's law, is a Common Slavic accent law named after Russian accentologists Vladimir Dybo and Vladislav Illich-Svitych.

According to the law, accent was shifted from non-acuted syllable to the following syllable if the word belonged to the non-mobile accentual paradigm.

Compare:

• PSl. *pir̃stu 'finger' (cf. Lithuanian pir̃štas) > *pirstù
• PSl. *kàtu > *katù > Russian kot, G sg kotá

References

• Ranko Matasović (2008) (in Croatian). Poredbenopovijesna gramatika hrvatskoga jezika. Zagreb: Matica hrvatska. ISBN 978-953-150-840-7. 
• Ronald F. Feldstein (1990). "On the Structural Meaning of the Dybo Law". Indiana Slavic Studies 5: pp. 43‑60.. http://www.indiana.edu/~pollang/dybo_law_iss5.pdf.