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Publications Influence

‘There are Really Two Cities Here’: Fragmented Urban Citizenship In Tel Aviv

- N. Cohen, T. Margalit
- Political Science
- 1 July 2015

type="main"> The inflow of African migrants into Tel Aviv's southern neighborhoods has aroused much resentment from long-term residents. Contesting the uneven burden sharing, which exacerbates… Expand

28 4

Ranks of Completions of Partial Matrices

- N. Cohen, C. Johnson, L. Rodman, H. Woerdeman
- Mathematics
- 1989

For an n-by-m array with some entries specified and the remainder free to be chosen from a given field, we study the possible ranks occurring among all completions. For any such partial matrix the… Expand

68 3

On solving the Lyapunov and Stein equations for a companion matrix

When the matrix A is in companion form, the essential step in solving the Lyapunov equation PA + ATP = −Q involves a linear n × n system for the first column of the solution matrix P. The complex… Expand

26 3

The Lyapunov order for real matrices

- N. Cohen, I. Lewkowicz
- Mathematics
- 1 April 2009

Abstract The real Lyapunov order in the set of real n × n matrices is a relation defined as follows: A ⩽ B if, for every real symmetric matrix S, SB + B t S is positive semidefinite whenever SA + A t… Expand

14 3

Rights Beyond Borders: Everyday Politics of Citizenship in the Israeli Diaspora

- N. Cohen
- Sociology
- 16 May 2011

This article examines the process by which Israeli migrants define, perceive and negotiate their diasporic citizenship rights and duties as regards their home state. Rights are a bundle of symbolic… Expand

9 3

Primary Subacute Epiphyseal Osteomyelitis: Role of Conservative Treatment

- E. Ezra, N. Cohen, +4 authors S. Wientroub
- Medicine
- Journal of pediatric orthopedics
- 1 May 2002

Primary subacute epiphyseal osteomyelitis is a rare disease. Owing to its insidious onset, mild symptoms, and inconsistent supportive laboratory data, diagnosis and treatment are usually delayed. The… Expand

28 2

A necessary and sufficient criterion for the stability of a convex set of matrices

- N. Cohen, I. Lewkowicz
- Mathematics
- 1 April 1993

A Hurwitz stability criterion for the convex hull of two matrices, due to C.R. Johnson (1976), is generalized to the case of any compact convex set of matrices. It is shown that the same criterion is… Expand

37 2

Frequency response envelopes of a family of uncertain continuous-time systems

- A. Levkovich, E. Zeheb, N. Cohen
- Mathematics
- 1 March 1995

Amplitude and phase envelopes of a family of interval rational transfer functions of continuous-time systems are derived. A finite number of intervals on the real frequency axis are explicitly… Expand

33 2

Convex invertible cones and the Lyapunov equation

- N. Cohen, I. Lewkowicz
- Mathematics
- 1997

Abstract Convex cones of matrices which are closed under matrix inversion are defined, and their structure is studied. Various connections with the algebraic Lyapunov equation of general inertia are… Expand

53 2

A pair of matrices sharing common Lyapunov solutions—A closer look

- N. Cohen, I. Lewkowicz
- Mathematics
- 1 February 2003

Abstract Let A , B be a pair of matrices with regular inertia. If HA + A * H and HB + B * H are both positive definite for some Hermitian matrix H then all matrices in conv( A , A −1 , B , B −1 )… Expand

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