Nonlocal symmetries. Heuristic approach

I. Sh Akhatov, R. K. Gazizov, N. Kh Ibragimov

Research output: Contribution to journalArticlepeer-review

151 Citations (Scopus)


A constructive method for constructing nonlocal symmetries of differential equations based on the Lie-Bäcklund theory of groups is developed. The concept of quasilocal symmetries is introduced. With the help of this method nonlocal symmetries of differential equations of the type of nonlinear thermal conductivity and gas dynamics are studied.

Original languageEnglish
Pages (from-to)1401-1450
Number of pages50
JournalJournal of Soviet Mathematics
Issue number1
Publication statusPublished - Jun 1991
Externally publishedYes


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