Geodesic
A remark to the definition of Nevanlinna matrices
Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 3 (1996), pp. 412-422.

Voir la notice de l'article provenant de la source Math-Net.Ru

We prove that the unimodular entire matrix-function $$\left(\begin{array}{cc}A(z)(z)\\C(z)(z)\end{array}\right)$$ with real entries is a Nevanlinna matrix provided that the three quotients $B/A$, $A/C$, and $D/C$ have positive imaginary part in the upper half-plane. 
@article{JMAG_1996_3_a12,
     author = {Mikhail Sodin},
     title = {A remark to the definition of {Nevanlinna} matrices},
     journal = {\v{Z}urnal matemati\v{c}eskoj fiziki, analiza, geometrii},
     pages = {412--422},
     publisher = {mathdoc},
     volume = {3},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JMAG_1996_3_a12/}
}
TY  - JOUR
AU  - Mikhail Sodin
TI  - A remark to the definition of Nevanlinna matrices
JO  - Žurnal matematičeskoj fiziki, analiza, geometrii
PY  - 1996
SP  - 412
EP  - 422
VL  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/JMAG_1996_3_a12/
LA  - en
ID  - JMAG_1996_3_a12
ER  - 
%0 Journal Article
%A Mikhail Sodin
%T A remark to the definition of Nevanlinna matrices
%J Žurnal matematičeskoj fiziki, analiza, geometrii
%D 1996
%P 412-422
%V 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JMAG_1996_3_a12/
%G en
%F JMAG_1996_3_a12
Mikhail Sodin. A remark to the definition of Nevanlinna matrices. Žurnal matematičeskoj fiziki, analiza, geometrii, Tome 3 (1996), pp. 412-422. http://geodesic.mathdoc.fr/item/JMAG_1996_3_a12/