EAP - Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics

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Proceedings of the Academy of Sciences of the Estonian SSR. Physics. Mathematics

1989 Vol. 38, Issue 4 Vol. 38, Issue 3 Vol. 38, Issue 2 Vol. 38, Issue 1 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967

1989 Vol. 38, Issue 4 Vol. 38, Issue 3 Vol. 38, Issue 2 Vol. 38, Issue 1 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 1976 1975 1974 1973 1972 1971 1970 1969 1968 1967

Open Access Journal

ON THE PRESERVATION OF CLASSES OF FUNCTIONS; pp. 1–6

PDF | https://doi.org/10.3176/phys.math.1989.1.01

Author

Jüri Lippus

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