Abstract:Let A be a set in a prime field F p . In this paper, we prove that d × d matrices with entries in A determine almost |A| 3+ 1 45 distinct determinants and almost |A| 2− 1 6 distinct permanents when |A| is small enough.
“…We note that similar results in the setting of Heisenberg group over prime fields for small sets were obtained recently by Hegyvári and Hennecart in [11]. Some generalizations can be found in [12,13]. We refer the interested reader to [5,19] and references therein for related results in the setting of R or Z.…”
In this paper, we study expanding phenomena in the setting of matrix rings. More precisely, we will prove that • If A is a set of M 2 (F q ) and |A| ≫ q 7/2 , then we have• If A is a set of SL 2 (F q ) and |A| ≫ q 5/2 , then we haveWe also obtain similar results for the cases of A(B + C) and A + BC, where A, B, C are sets in M 2 (F q ).
“…We note that similar results in the setting of Heisenberg group over prime fields for small sets were obtained recently by Hegyvári and Hennecart in [11]. Some generalizations can be found in [12,13]. We refer the interested reader to [5,19] and references therein for related results in the setting of R or Z.…”
In this paper, we study expanding phenomena in the setting of matrix rings. More precisely, we will prove that • If A is a set of M 2 (F q ) and |A| ≫ q 7/2 , then we have• If A is a set of SL 2 (F q ) and |A| ≫ q 5/2 , then we haveWe also obtain similar results for the cases of A(B + C) and A + BC, where A, B, C are sets in M 2 (F q ).
“…Similar results in the setting of Heisenberg group over prime fields for small sets were obtained recently by Hegyvári and Hennecart in [8]. Some generalizations can be found in [9,10,17,19].…”
In this paper, we study the expanding phenomena in the setting of higher dimensional matrix rings. More precisely, we obtain a sum-product estimate for large subsets and show that x(y + z), x + yz, xy + z + t are moderate expanders over the matrix ring M n (F q ).These results generalize recent results of Y.
“…Remark 3. In papers [3], [10], a problem similar to our was considered, but for permanents. In particular, there it was proved that the number of distinct permanents of matrices with entries in a set A is at least |A| 2− 1 6 +o(1) , where o(1) tends to zero with the growth of matrices size.…”
Section: Proof Of the Main Resultsmentioning
confidence: 99%
“…One considers a function of several variables and explores how big is the image of the function while the arguments run along a finite set A, see [1], [2]. on matrices and distributions (particularly, on distributions of their determinants) Some related problems are considered in papers [3], [4], [5], particularly a problem on the distribution of determinants. A continuous counterpart of the examining problem is presented in [6].…”
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