For any smooth free action of the unit circle S in a manifold M ; the Gysin sequence of M is a long exact sequence relating the DeRham cohomologies of M and its orbit space M/S. If the action is not free then M/S is not a manifold but a stratified pseudomanifold and there is a Gysin sequence relating the DeRham cohomology of M with the intersection cohomology of M/S. In this work we extend the ...

The benign lesions of esophagus constitutes small part of all esophageal tumors and among them giant esophageal polyps are exceptionally rarely reported. The authors present the uncommon case of pedunculated giant fibrovascular polyp (lenght 12cm and diameter 2cm) in the esophagus in a 79-years-old woman who was admitted to our department because of hoarseness, throat discomfort during swallowi...

The Gap-Hamming distance problem is the promise problem of deciding if the Hamming distance h between two strings of length n is greater than a or less than b, where the gap g = |a − b| ≥ 1 and a and b could depend on n. In this short note, we give a lower bound of Ω( √ n/g) on the quantum query complexity of computing the GapHamming distance between two given strings of lenght n. The proof is ...

We give many examples in which there exist infinitely many divisorial conditions on the moduli space of polarized K3 surfaces (S,H) of degree H = 2g− 2, g ≥ 3, and Picard number ρ(S) = rkN(S) = 2 such that for a general K3 surface S satisfying these conditions the moduli space of sheaves MS(r,H, s) is birationally equivalent to the Hilbert scheme S[g − rs] of zero-dimensional subschemes of S of...

This paper presents an LMI based algorithm for deterministic worst–case identification of non Schur plants in an open-loop setting. Contrary to other approaches dealing with this problem, the proposed technique does not require prior knowledge of a stabilizing controller. The main result of the paper shows that, as the information is completed, i.e. in the limit when the number of samples tends...

We suggest a new algorithm for finding a canonical representative of a given braid, and also for the harder problem of finding a σ1 consistent representative. We conjecture that the algorithm is quadratictime. We present numerical evidence for this conjecture, and prove two results: (1) The algorithm terminates in finite time. (2) The conjecture holds in the special case of 3-string braids in f...

In order to determine some biological characteristics of Aksu stream Garra turcica population, 168 individuals were examined between 2013-2014. The ages the are 0 and IV. it was determined be between. Total lenght weight values calculated as 3.9-16.6 cm (8.54 ± 2.36 cm) 0.81-58.50 g (9.40 8.30 g), respectively. length-weight relationship W = 0,0145L2.9172. Growth parameters estimated L∞ 21.77 c...