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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Biraz da tarih deyince Cengiz Ulucay merhumu hatirladim.<o:p></o:p></p>
<p class="MsoNormal">Yetmisli yillarin basiydi.<o:p></o:p></p>
<p class="MsoNormal">Kompleks Fonksiyonlar Teorisinde onemli bir “conjecture”I kanitladigini dusunuyordu. Meslekdaslari ispatinda Zayif bir nokta oldugunu soyluyorlardi. Ama Ulucay onlar gibi dusunmuyordu. Bize anlatti ama anlayamadik.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Sanirim Sayin Okay Celebi’nin ve Sayin Zerrin Gokturk’un bir fikri vardir.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">M Can<o:p></o:p></p>
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<p class="MsoNormal"><b>From:</b> Tmd-uye <tmd-uye-bounces@listweb.bilkent.edu.tr>
<b>On Behalf Of </b>yilmaz akyildiz<br>
<b>Sent:</b> Sunday, April 29, 2018 11:07 PM<br>
<b>To:</b> turkmath <turkmath@listweb.bilkent.edu.tr>; tmd <tmd-uye@listweb.bilkent.edu.tr>; Robert Langlands <rpl@ias.edu><br>
<b>Subject:</b> [Tmd-uye: 2059] biraz tarih...<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:18.0pt;font-family:"Comic Sans MS"">"... </span><i><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;background:white">My office in Ankara was next to that of Cahit Arf, and when I mentioned
the question to him, he drew my attention to a paper of Hasse that had appeared in a journal not widely read, the</span></i><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;background:white"> Acta Salmanticensia <i>of 1954. He fortunately
had a reprint. So I could begin to think seriously about the matter. The critical idea came in April 1968 in a hotel room in Izmir, where I had gone to deliver a lecture. It was the understanding that all identities needed were consequences of four basic ones,
formulated in the notes as the four main lemmas. Once this is understood and basic facts about Gauss sums are understood, as in the papers of Lamprecht and Davenport-Hasse, three of these four identities are not so difficult to establish. The second main lemma
turned out, on the other hand, to be a major obstacle. Fortunately while leafing idly through journals in the library, either in Ankara or later in New Haven (I no longer remember), I came across Dwork's paper in which the first and the second main lemmas
were proved. Dwork had indeed tried to establish a product formula for what has come to be called the </i></span><span class="gmail-mi"><i><span style="font-size:13.5pt;font-family:"STIXGeneral",serif;color:black;border:none windowtext 1.0pt;padding:0in;background:white">ϵ</span></i></span><span class="gmail-mjxassistivemathml"><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;border:none windowtext 1.0pt;padding:0in;background:white">ϵ</span></span><i><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;background:white">-factor..."</span></i><span style="font-size:18.0pt;font-family:"Comic Sans MS""><o:p></o:p></span></p>
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<p class="MsoNormal"><i><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;background:white">Robert Langlands</span></i><span style="font-size:18.0pt;font-family:"Comic Sans MS""><o:p></o:p></span></p>
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<p class="MsoNormal"><i><span style="font-size:11.5pt;font-family:"Helvetica",sans-serif;color:black;background:white"><a href="http://publications.ias.edu/rpl/section/22">http://publications.ias.edu/rpl/section/22</a></span></i><span style="font-size:18.0pt;font-family:"Comic Sans MS""><o:p></o:p></span></p>
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