scholarly journals Geometric transitions

2006 ◽  
Vol 56 (9) ◽  
pp. 1940-1983 ◽  
Author(s):  
Michele Rossi
Keyword(s):  
Geometric Transitions

scholarly journals Geometric transitions and integrable systems

2006 ◽  
Vol 752 (3) ◽  
pp. 329-390 ◽  
Author(s):  
D.-E. Diaconescu ◽  
R. Dijkgraaf ◽  
R. Donagi ◽  
C. Hofman ◽  
T. Pantev
Keyword(s):  
Integrable Systems ◽  
Geometric Transitions

scholarly journals Geometric transitions, flops and non-Kähler manifolds: II

2006 ◽  
Vol 738 (1-2) ◽  
pp. 124-183 ◽  
Author(s):  
Melanie Becker ◽  
Keshav Dasgupta ◽  
Sheldon Katz ◽  
Anke Knauf ◽  
Radu Tatar
Keyword(s):  
Kähler Manifolds ◽  
Kahler Manifolds ◽  
Geometric Transitions

scholarly journals Deforming geometric transitions

2015 ◽  
Vol 12 (05) ◽  
pp. 1550059 ◽  
Author(s):  
Michele Rossi
Keyword(s):  
Moduli Space ◽  
Equivalence Classes ◽  
Complex Moduli ◽  
Geometric Transitions

After a quick review of the wild structure of the complex moduli space of Calabi-Yau 3-folds and the role of geometric transitions in this context (the Calabi-Yau web) the concept of deformation equivalence for geometric transitions is introduced to understand the arrows of the Gross–Reid Calabi-Yau web as deformation-equivalence classes of geometric transitions. Then the focus will be on some results and suitable examples to understand under which conditions it is possible to get simple geometric transitions, which are almost the only well-understood geometric transitions both in mathematics and in physics.

scholarly journals Wilson loops, geometric transitions and bubbling Calabi-Yau's

2007 ◽  
Vol 2007 (02) ◽  
pp. 083-083 ◽  
Author(s):  
Jaume Gomis ◽  
Takuya Okuda
Keyword(s):  
Wilson Loops ◽  
Geometric Transitions

Efficient Modeling of Fretting of Blade/Disk Contacts Including Load History Effects

2004 ◽  
Vol 126 (1) ◽  
pp. 56-64 ◽  
Author(s):  
H. Murthy ◽  
G. Harish ◽  
T. N. Farris
Keyword(s):  
Frictional Contact ◽  
Contact Region ◽  
Singular Integral Equations ◽  
Numerical Approach ◽  
Design Tool ◽  
Load History ◽  
Near Surface ◽  
History Effects ◽  
Geometric Transitions ◽  
Fretting Damage

Fretting is a frictional contact phenomenon that leads to damage at the contact region between two nominally-clamped surfaces subjected to oscillatory motion of small amplitudes. The region of contact between the blade and the disk at the dovetail joint is one of the critical locations for fretting damage. The nominally flat geometry of contacting surfaces in the dovetail causes high contact stress levels near the edges of contact. A numerical approach based on the solution to singular integral equations that characterize the two-dimensional plane strain elastic contact of two similar isotropic surfaces presents itself as an efficient technique to obtain the sharp near-surface stress gradients associated with the geometric transitions. Due to its ability to analyze contacts of any two arbitrary smooth surfaces and its computational efficiency, it can be used as a powerful design tool to analyze the effects of various factors like shape of the contact surface and load histories on fretting. The calculations made using the stresses obtained from the above technique are consistent with the results of the experiments conducted in the laboratory.

scholarly journals In the realm of the geometric transitions

2005 ◽  
Vol 704 (1-2) ◽  
pp. 231-278 ◽  
Author(s):  
Stephon Alexander ◽  
Katrin Becker ◽  
Melanie Becker ◽  
Keshav Dasgupta ◽  
Anke Knauf ◽  
...  
Keyword(s):  
Geometric Transitions

scholarly journals FOUR LECTURES ON THE GAUGE/GRAVITY CORRESPONDENCE

2003 ◽  
Vol 18 (31) ◽  
pp. 5647-5711 ◽  
Author(s):  
MATTEO BERTOLINI
Keyword(s):  
Gauge Theory ◽  
Riemann Surfaces ◽  
Gauge Theories ◽  
Open Problems ◽  
Four Dimensions ◽  
General Overview ◽  
Geometric Transitions ◽  
Supersymmetric Gauge ◽  
Gauge Gravity ◽  
M Theory

We review in a pedagogical manner some of the efforts aimed at extending the gauge/gravity correspondence to nonconformal supersymmetric gauge theories in four dimensions. After giving a general overview, we discuss in detail two specific examples: fractional D-branes on orbifolds and D-branes wrapped on supersymmetric cycles of Calabi–Yau spaces. We explore in particular which gauge theory information can be extracted from the corresponding supergravity solutions, and what the remaining open problems are. We also briefly explain the connection between these and other approaches, such as fractional branes on conifolds, branes suspended between branes, M5-branes on Riemann surfaces and M-theory on G2-holonomy manifolds, and discuss the role played by geometric transitions in all that.

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