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pro vyhledávání: '"Friedman, Robert"'
Autor:
Friedman, Robert, Griffiths, Phillip
An I-surface $X$ is a surface of general type with $K_X^2 =1$ and $p_g(X) =2$. This paper studies the asymptotic behavior of the period map for I-surfaces acquiring simple elliptic singularities. First we describe the relationship between the deforma
Externí odkaz:
http://arxiv.org/abs/2408.02062
Autor:
Friedman, Robert, Griffiths, Phillip
An I-surface $S$ is an algebraic surface of general type with $K_S^2 = 1$ and $p_g(S) = 2$. Recent research has centered on trying to give an explicit description of the KSBA compactification of the moduli space of these surfaces. The possible normal
Externí odkaz:
http://arxiv.org/abs/2402.17677
Autor:
Friedman, Robert, Laza, Radu
Recent progress in the deformation theory of Calabi-Yau varieties $Y$ with canonical singularities has highlighted the key role played by the higher Du Bois and higher rational singularities, and especially by the so-called $k$-liminal singularities
Externí odkaz:
http://arxiv.org/abs/2306.03755
Autor:
Friedman, Robert, Laza, Radu
Publikováno v:
Forum Math Sigma Vol. 12 (2024), e59, 1-25
The goal of this paper is to describe certain nonlinear topological obstructions for the existence of first order smoothings of mildly singular Calabi-Yau varieties of dimension at least $4$. For nodal Calabi-Yau threefolds, a necessary and sufficien
Externí odkaz:
http://arxiv.org/abs/2302.08488
Autor:
Friedman, Robert, Laza, Radu
Publikováno v:
J. Algebraic Geom. 33 (2024), No. 3, 493-520
Higher rational and higher Du Bois singularities have recently been introduced as natural generalizations of the standard definitions of rational and Du Bois singularities. In this note, we discuss these properties for isolated singularities, especia
Externí odkaz:
http://arxiv.org/abs/2207.07566
Autor:
Wright, Julie A, Quintiliani, Lisa M, Turner-McGrievy, Gabrielle M, Migneault, Jeffrey P, Heeren, Timothy, Friedman, Robert H
Publikováno v:
JMIR Research Protocols, Vol 3, Iss 4, p e62 (2014)
BackgroundHealth behavior change interventions have focused on obtaining short-term intervention effects; few studies have evaluated mid-term and long-term outcomes, and even fewer have evaluated interventions that are designed to maintain and enhanc
Externí odkaz:
https://doaj.org/article/8d9e59f957bc4645a2d8945b00c52dd2
Autor:
Friedman, Robert, Laza, Radu
We prove that the higher direct images $R^qf_*\Omega^p_{\mathcal Y/S}$ of the sheaves of relative K\"ahler differentials are locally free and compatible with arbitrary base change for flat proper families whose fibers have $k$-Du Bois local complete
Externí odkaz:
http://arxiv.org/abs/2205.04729
Autor:
Friedman, Robert, Laza, Radu
We study deformations of certain crepant resolutions of isolated rational Gorenstein singularities. After a general discussion of the deformation theory, we specialize to dimension three and consider examples which are good (log) resolutions as well
Externí odkaz:
http://arxiv.org/abs/2203.11738