Results 151 to 160 of about 11,355 (303)

Back to heterotic strings on ALE spaces. Part II. Geometry of T-dual little strings

open access: yesJournal of High Energy Physics
This work is the second of a series of papers devoted to revisiting the properties of Heterotic string compactifications on ALE spaces. In this project we study the geometric counterpart in F-theory of the T-dualities between Heterotic ALE instantonic ...
Michele Del Zotto   +2 more
doaj   +1 more source

Calabi–Yau threefolds fibred by mirror quartic K3 surfaces [PDF]

open access: yes, 2016
We study threefolds fibred by mirror quartic K3 surfaces. We begin by showing that any family of such K3 surfaces is completely determined by a map from the base of the family to the moduli space of mirror quartic K3 surfaces. This is then used to give a
Alan Thompson (5686433)   +3 more
core   +1 more source

Automorphisms of positive entropy on some hyperKahler manifolds via derived automorphisms of K3 surfaces

open access: yes, 2017
In this talk, I would like to give examples of projective hyperKahler manifolds of Picard number two with automorphisms of positive topological entropy. These are constructed as moduli spaces of stable sheaves on K3 surfaces.
Ouchi, Genki
core  

Nodal Curves on K3 Surfaces

open access: yes, 2016
In this paper, we study the Severi variety $V_{L,g}$ of genus $g$ curves in $|L|$ on a general polarized K3 surface $(X,L)$. We show that the closure of every component of $V_{L,g}$ contains a component of $V_{L,g-1}$. As a consequence, we see that the general members of every component of $V_{L,g}$ are nodal.
openaire   +3 more sources

Cooperative Redox Catalysis of N2O Decomposition by Short‐Range RhOx and CeOx Anchored to Co3O4

open access: yesAngewandte Chemie International Edition, EarlyView.
A short‐range Rh–O–Co–O–Ce interfacial moiety drives low‐temperature N2O decomposition via a cooperative redox cycle. Operando modulated‐excitation XAS with phase‐sensitive detection (ME‐XAS + PSD) tracks rapid, reversible Rh oxidation coupled to Co reduction.
Daniel C. Cano‐Blanco   +7 more
wiley   +1 more source

Moduli of reflexive K3 surfaces

open access: yes, 1997
"A complex polarized K3 surface (X,H) is reflexive if (1) H2 = 2; (2) there exists a divisor L with L·H = 0, L2 = −12; (3) D·H > 2 for every nodal curve D in X.
U. Bruzzo   +2 more
core  

Quartic surfaces with a Galois point and Eisenstein K3 surfaces

open access: yes, 2023
We prove that there exists a one to one correspondence between smooth quartic surfaces with an inner Galois point and Eisenstein $K3$ surfaces of type $(4, 3)$.
Miura, Kei, Taki, Shingo
core  

The cranial, mandibular, and hyoid anatomy of softshell turtles (Trionychidae): A revised character list for phylogenetic analysis

open access: yesThe Anatomical Record, EarlyView.
Abstract Softshell turtles (Pan‐Trionychidae) are an early branching clade of hidden‐necked turtles (Cryptodira) with a rich fossil record extending back to the Early Cretaceous. The evolutionary history of softshell turtles is still unresolved because of their conservative morphology combined with high levels of polymorphism related to morphological ...
Léa C. Girard, Walter G. Joyce
wiley   +1 more source

Order 3 symplectic automorphisms on K3 surfaces

open access: yes, 2022
The aim of this paper is to generalize results known for the symplectic involutions on K3 surfaces to the order 3 symplectic automorphisms on K3 surfaces.
Garbagnati, Alice   +1 more
core  

Listening to Hong Kong children's perspectives through pretend play

open access: yesBritish Educational Research Journal, EarlyView.
Abstract Quality in early childhood education and care (ECEC) has become an increasing concern in recent years. The issue has been regularly discussed by different stakeholders. However, the rising concern regarding quality in ECEC has not seriously taken into account children's perspectives.
Suzannie K. Y. Leung
wiley   +1 more source

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