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To: undisclosed-recipients:;undisclosed-recipients:;undisclosed-recipients:;undisclosed-recipients:;undisclosed-recipients:;;;;;;;;;;;;
From: Ki Haseo <haseo@bubble.yonsei.ac.kr>
Date: Tue, 28 Jul 1998 00:16:52 +0900 (KST)
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Sender: owner-opsftalk




Dear Sir,

We would like to ask you when hypergeometric functions
(entire functions with real coefficients) have real zeros only.
Are they open?
We could observe that confluent hypergeometric functions with
real coefficients have real zeros only on an sufficients and
necessary condition. We believe that it is known for this particular
case.


We would be very happy to hear from you.


Sincerely yours,


Haseo Ki and Young-One Kim.


P.S.  We know your e-mail address from Professor Koornwinder.

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