Suresh Nayak

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We use the anti-equivalence between Cohen-Macaulay complexes and coherent sheaves on formal schemes to shed light on some older results and prove new results. We bring out the relations between a coherent sheaf M satisfying an S2 condition and the lowest cohomology N of its “dual” complex. We show that if a scheme has a Gorenstein complex satisfying certain(More)
Six cases of unusual neuroenteric (NE) cysts, occurring in children aged 15 months to 18 years, are reported here. Three of the cysts were extramedullary, while the other three were intramedullary. Two of the extramedullary cysts were located at the lumbosacral region, an unusual site. Only one patient had the cyst located in a ventral relation to the cord(More)
We show that any separated essentially finite-type map f of noetherian schemes globally factors as f = hi where i is an injective localization map and h a separated finite-type map. In particular, via Nagata’s compactification theorem, h can be chosen to be proper. We apply these results to Grothendieck duality. We also obtain other factorization results(More)
Two pediatric patients (4 and 5 years of age) with spinal intramedullary ependymal cysts located at the cervical and dorsal cord are reported here. One patient was admitted with subtle signs, while the other had disabling spastic quadriparesis. In both patients, MRI depicted a well-demarcated, localized, nonenhancing intramedullary lesion isointense with(More)
BACKGROUND AND PURPOSE To demonstrate the safety and efficacy of balloon-expandable intracranial stents in patients with intracranial atherosclerotic lesions (>70% stenosis) who were symptomatic despite being on optimum medical therapy. METHODS Between April 2004 and May 2012, 182 patients underwent intracranial stenting in our institution. All patients(More)
On a suitable category of formal schemes equipped with codimension functions we construct a canonical pseudofunctor (−)♯ taking values in the corresponding categories of Cousin complexes. Cousin complexes on such a formal scheme X functorially represent derived-category objects F by the local cohomologies H codim(x) x F (x ∈ X) together with “residue maps”(More)
BACKGROUND To evaluate the safety and efficacy of stent-assisted coiling of ruptured intracranial wide-necked aneurysms in a setting of acute subarachnoid hemorrhage, without compromising on the antiplatelet regimen. METHODS Forty-two consecutive patients who underwent stent-assisted coiling for ruptured wide-necked intracranial aneurysms from August 2008(More)
OBJECTIVES To identify whether electively induced labor places the mother or her fetus at an increased risk as compared to her spontaneous labor cohort. To quantify the risk of cesarean section in the induced group. METHODS A prospective analysis comparing 200 electively induced parturients with 200 matched controls who labored spontaneously, in 1 year(More)
In the present study, we discuss the accuracy of digital subtraction angiography (DSA) in diagnosis of thrombus in the common carotid artery and its role in the medical management of this disorder. Between 2006 and 2011, four patients (age group ranging from 26 to 48 years) presented to our institution with symptoms of stroke. DSA in all these patients(More)