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- Gregory Freiman
- Discrete Mathematics
- 1993

- Noga Alon, Gregory Freiman
- Combinatorica
- 1988

- Gregory Freiman, Simon Litsyn, Alexander A. Yudin
- IEEE Trans. Communications
- 2004

- Mark Chaimovich, Gregory Freiman, Zvi Galil
- J. Complexity
- 1989

- Gregory Freiman, Simon Litsyn
- IEEE Trans. Information Theory
- 1999

The spectral-null code S(n; k) of k-th order and length n is the union of n-tuples with 1 components, having k-th order spectral null at zero frequency. We determine the exact asymptotic in n behaviour of the size of such codes. In particular, we prove that for n satisfying some divisibility conditions, log 2 jS(n; k)j = n ? k 2 2 log 2 n + c k + o(1),… (More)

- Gregory Freiman
- The American imago; a psychoanalytic journal for…
- 1972

- Gregory Freiman, Alexander A. Yudin
- Eur. J. Comb.
- 2013

- Gregory Freiman
- 1987

For r-~2 let p(n, r ) denote the maximum cardinality of a subset A of N = { 1 , 2 . . . . , n} such that there are no B c A and an integer y with S b = y ' . I t is shown that for any e >-0 and bEB n>-n(e), (l+o(l))2~/t'+l>n('-l>/t'+l)~_p(n, r)~_n~§ for all r_~5, and that for every fixed r~_6, p(n,r)=(l+o(1)).21/t'+~)n (~-1)/('§ as n ~ . Let f(n,m) denote t… (More)

Nuclear Magnetic Relaxation Dispersion (NMRD) is strongly sensitive to the microscopic wettability of oil and brine bearing carbonate rocks. Exploring a very large range of low frequency enables isolating the typical NMRD dispersion features, 1/T1Surf, associated to the different processes of molecular surface dynamics. This allows a separation of the… (More)

We study the connection between the additive structure of a finite set A ⊂ Z and the measure of large values of a trigonometric sum.