<div dir="ltr">Sayın liste üyeleri,<div><br></div><div><b>1 Mart, Perşembe, 16:00'da</b> MSGSÜ Matematik Bölümü Semineri'nde Hacettepe Üniversitesi Matematik Bölümü'nden <b>Uğur GÜL</b> " Invertibility in a C*-algebra of operators acting on the Hardy space of unit disc via tensor products" başlıklı bir konuşma verecektir. Konuşmanın özeti aşağıda yer almaktadır.</div><div><br></div><div>Seminerde görüşmek dileğiyle,</div><div>Sibel ŞAHİN</div><div><br></div><div><b>Başlık:</b> <span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline">Invertibility in a C*-algebra of operators acting on the Hardy space of unit disc via tensor products.</span></div><div><span style="color:rgb(34,34,34);font-family:arial,sans-serif;font-size:small;font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;font-weight:400;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><br></span></div><div><span style="color:rgb(34,34,34);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><b>Özet: </b><span style="font-weight:400;color:rgb(0,0,0);font-style:normal;font-variant-ligatures:normal;font-variant-caps:normal;letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px;background-color:rgb(255,255,255);text-decoration-style:initial;text-decoration-color:initial;float:none;display:inline"><font face="arial, helvetica, sans-serif" style="">In this talk we will deal with invertibility of certain linear algebraic sums in a C*-algebra generated by Toeplitz operators and Fourier multipliers which act on the Hardy space of the unit disc Finding an invertibility criterion we will apply this criterion to the characterization of Fredholmness for some elements in a tensor product algebra which act on the Hardy space of the bi-disc. These results constitute joint work with B.B.Koca of İstanbul University.</font></span>

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