On discrete Twist and Four-Flux in N = 1 heterotic/F -theory compactifications
نویسنده
چکیده
We give an indirect argument for the matching G2 = −π∗γ 2 of four-flux and discrete twist in the duality between N = 1 heterotic string and F -theory. This treats in detail the Euler number computation for the physically relevant case of a Calabi-Yau fourfold with singularities. [email protected], supported by U.S. DOE grant DE-FG05-85ER40219/Task A. [email protected], supported by NSF grant DMS9627351. E-mail address after 1.July: [email protected]
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تاریخ انتشار 1999