The deformation relation on the set of Cohen-Macaulay modules on a quotient surface singularity

2011 ◽  
Vol 93 ◽  
pp. 41-50
Author(s):  
Trond Stølen Gustavsen ◽  
Runar Ile
Keyword(s):  
Surface Singularity ◽  
Quotient Surface ◽  
Quotient Surface Singularity

scholarly journals Symplectic fillings of links of quotient surface singularities

2012 ◽  
Vol 207 ◽  
pp. 1-45 ◽  
Author(s):  
Mohan Bhupal ◽  
Kaoru Ono
Keyword(s):  
Surface Singularity ◽  
Quotient Surface ◽  
Surface Singularities ◽  
Quotient Surface Singularity

AbstractWe study symplectic deformation types of minimal symplectic fillings of links of quotient surface singularities. In particular, there are only finitely many symplectic deformation types for each quotient surface singularity.

Part II: Steady aerofoil-spoiler characteristics

1987 ◽  
Vol 91 (908) ◽  
pp. 359-366
Keyword(s):  
Separated Flow ◽  
Experimental Results ◽  
Surface Singularity ◽  
Separation Region ◽  
Two Dimensional ◽  
Trailing Edge ◽  
Singularity Method ◽  
Total Head ◽  
Low Speeds ◽  
Theoretical Results

Summary A surface singularity method has been formulated to predict two-dimensional spoiler characteristics at low speeds. Vorticity singularities are placed on the aerofoil surface, on the spoiler surface, on the upper separation streamline from the spoiler tip and on the lower separation streamline from the aerofoil trailing edge. The separation region is closed downstream by two discrete vortices. The flow inside the separation region is assumed to have uniform total head. The downstream extent of the separated wake is an empirical input. The flows both external and internal to the separated regions are solved. Theoretical results have been obtained for a range of spoiler-aerofoil configurations which compare reasonably with experimental results. The model is deficient in that it predicts a higher compression ahead of the spoiler than obtained in practice. Furthermore, there is a minimum spoiler angle below which a solution is not possible; it is thought that this feature is related to the physical observation that at small spoiler angles, the separated flow from the spoiler reattaches on the aerofoil upper surface ahead of the trailing edge.

Three-dimensional surface singularity of an interface crack

1991 ◽  
Vol 50 (3) ◽  
pp. 221-237 ◽  
Author(s):  
Roshdy S. Barsoum ◽  
Tzi-Kang Chen
Keyword(s):  
Interface Crack ◽  
Three Dimensional ◽  
Surface Singularity ◽  
Dimensional Surface

scholarly journals Infinitesimal deformations of quotient surface singularities

1988 ◽  
Vol 20 (1) ◽  
pp. 31-66 ◽  
Author(s):  
Kurt Behnke ◽  
Constantin Kahn ◽  
Oswald Riemenschneider
Keyword(s):  
Quotient Surface ◽  
Surface Singularities ◽  
Infinitesimal Deformations
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