We prove that the moduli space of stable sheaves of rank 2 with a certain Chern classes on a smooth quadric Q in P3, is isomorphic to P3. Using this identification, we give a new proof that a certain BrillNoether locus on a non-hyperelliptic curve of genus 4, is isomorphic to the Donagi-Izadi cubic threefold.

Consider a bundle of circles passing through 0 in 4-dimensional space. It is said to be rectifiable if there is a germ of diffeomorphism at 0 that takes all circles from our bundle to straight lines. We will give a classification of all rectifiable bundles of circles containing sufficiently many circles in general position. This result is surprisingly different from those in dimensions 2 and 3 ...

We prove that a certain Brill-Noether locus over a nonhyperelliptic curve C of genus 4, is isomorphic to the Donagi-Izadi cubic threefold in the case when the pencils of the two trigonal line bundles of C coincide.

We prove that a certain Brill-Noether locus over a nonhyperelliptic curve C of genus 4, is isomorphic to the Donagi-Izadi cubic threefold in the case when the pencils of the two trigonal line bundles of C coincide.

concessionaire: ayatollah ahmad beheshti managing editor: mohsen izadi editor in chif: saeid beheshti executive manager: mahdi behshti     editorial board editorial board hasan ebrahimi: assistant professor, tehran university. saeid behshti: associate professor, allameh tabatabaei university. mansoor pahlavan: professor, tehran university. mohammad zabihi: associate professor qom university. ab...

concessionaire: ayatollah ahmad beheshti managing editor: mohsen izadi editor in chif: saeid beheshti executive manager: mahdi behshti   editorial board hasan ebrahimi: assistant professor, tehran university. saeid behshti: associate professor, allameh tabatabaei university. mansoor pahlavan: professor, tehran university. mohammad zabihi: associate professor qom university. abdolmajid talebtash...

Kuga-Satake varieties are abelian varieties associated to certain weight two Hodge structures, for example the second cohomology group of a K3 surface. We start with an introduction to Hodge structures and we give a detailed account of the construction of Kuga-Satake varieties. The Hodge conjecture is discussed in section 2. An excellent survey of the Hodge conjecture for abelian varieties is [...

reason and religion biquartery journal of institute of dinpazhoohi-e - alavi volume 7&8, number 13&14 concessionaire: ayatollah ahmad beheshti managing editor: mohsen izadi editor in chif: saeid beheshti executive manager: mahdi behshti       editorial board ahmad beheshti: professor, tehran university and howzeh. saeid beheshti: professor, allameh tabatabaei university. ahmad abedi: associate ...

Breast cancer is the most frequently diagnosed cancer and the leading cause of cancer death in women. Biologic markers, such as hormone receptors including estrogen receptor (ER), progesterone receptor (PR), human epidermal growth factor receptor 2 (HER2) overexpression, tumor size, histological grade and subgroup status, lymph node involvement have prognostic and/or predictive value and are im...

Background: With the increase in the number of premature neonates, there are concerns about the complications of this group. One of the common complications of preterm neonates is fungal sepsis. Therefore, this study was conducted to evaluate the efficacy of intravenous fluconazole on fungal sepsis and other complications related to premature newborns under 1200 g in a neonatal intensive care u...