Open Access
June 2006 The vertex on a strip
Amer Iqbal, Amir-Kian Kashani-Poor
Adv. Theor. Math. Phys. 10(3): 317-343 (June 2006).


We demonstrate that for a broad class of local Calabi--Yau geometries built around a string of $\I\mathbb{P}^1$'s — those whose toric diagrams are given by triangulations of a strip — we can derive simple rules, based on the topological vertex, for obtaining expressions for the topological string partition function in which the sums over Young tableaux have been performed. By allowing non-trivial tableaux on the external legs of the corresponding web diagrams, these strips can be used as building blocks for more general geometries. As applications of our result, we study the behavior of topological string amplitudes under flops, as well as check Nekrasov's conjecture in its most general form.


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Amer Iqbal. Amir-Kian Kashani-Poor. "The vertex on a strip." Adv. Theor. Math. Phys. 10 (3) 317 - 343, June 2006.


Published: June 2006
First available in Project Euclid: 30 July 2006

zbMATH: 1131.14045
MathSciNet: MR2250273

Rights: Copyright © 2006 International Press of Boston

Vol.10 • No. 3 • June 2006
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