Ghost symmetries

Peter J. Olver, Jan A. Sanders, Jing Ping Wang

Research output: Contribution to journalArticlepeer-review

25 Scopus citations


We introduce the notion of a ghost characteristic for nonlocal differential equations. Ghosts are essential for maintaining the validity of the Jacobi identity for the characteristics of nonlocal vector fields.

Original languageEnglish (US)
Pages (from-to)164-172
Number of pages9
JournalJournal of Nonlinear Mathematical Physics
StatePublished - 2002

Bibliographical note

Funding Information:
Acknowledgments: The research of P.J. Olver was supported in part by NSF Grant DMS 98–03154. J.P. Wang gratefully acknowledges the support from Netherlands Organization for Scientific Research (NWO) for this research.

Publisher Copyright:
Copyright © 2002 by P J Olver, J A Sanders and J P Wang.


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