6,997 research outputs found
The moduli spaces of S-fold CFTs
No full textAbstract An S-fold has played an important role in constructing supersymmetric field theories with interesting features. It can be viewed as a type of AdS4 solutions of Type IIB string theory where the fields in overlapping patches are glued by elements of SL(2, ℤ). This paper examines three dimensional quiver theories that arise from brane configurations with an inclusion of the S-fold. An important feature of such a quiver is that it contains a link, which is the T (U(N)) theory, between two U(N) groups, along with bifundamental and fundamental hypermultiplets. We systematically study the moduli spaces of those quiver theories, including the cases in which the non-zero Chern-Simons levels are turned on. A number of such moduli spaces turns out to have a very rich structure and tells us about the brane dynamics in the presence of an S-fold
Variations on S-fold CFTs
No full textAbstract A local SL(2, ℤ) transformation on the Type IIB brane configuration gives rise to an interesting class of superconformal field theories, known as the S-fold CFTs. Previously it has been proposed that the corresponding quiver theory has a link involving the T(U(N)) theory. In this paper, we generalise the preceding result by studying quivers that contain a T(G) link, where G is self-dual under S-duality. In particular, the cases of G = SO(2N), USp′(2N) and G 2 are examined in detail. We propose the theories that arise from an appropriate insertion of an S-fold into a brane system, in the presence of an orientifold threeplane or an orientifold fiveplane. By analysing the moduli spaces, we test such a proposal against its S-dual configuration using mirror symmetry. The case of G 2 corresponds to a novel class of quivers, whose brane construction is not available. We present several mirror pairs, containing G 2 gauge groups, that have not been discussed before in the literature
Entropy function from toric geometry
No full textIt has recently been claimed that a Cardy-like limit of the superconformal index of 4d N = 4 SYM accounts for the entropy function, whose Legendre transform corresponds to the entropy of the holographic dual AdS5 rotating black hole. Here we study this Cardy-like limit for N = 1 toric quiver gauge theories, observing that the corresponding entropy function can be interpreted in terms of the toric data. Furthermore, for some families of models, we compute the Legendre transform of the entropy function, comparing with
similar results recently discussed in the literature
Supersymmetric indices of 3d S-fold SCFTs
No full textEnhancement of global symmetry and supersymmetry in the infrared is one of the most intriguing phenomena in quantum field theory. We investigate such phenomena in a large class of three dimensional superconformal field theories, known as the S-fold SCFTs. Supersymmetric indices are computed for a number of theories containing small rank gauge groups. It is found that indices of several models exhibit enhancement of supersymmetry at the superconformal fixed point in the infrared. Dualities between S-fold theories that have different quiver descriptions are also analysed. We explore a new class of theories with a discrete global symmetry, whose gauge symmetry in the quiver has a different global structure from those that have been studied earlier
Yuriy Hryvniak as a researcher of the biography of Ivan Puluj
No full textМатеріал тез присвячено дослідженню сторінок біографії
Юрія Гривняка - автора монографії про Івана Пулюя, яку було
опубліковано 1971 року у Лондоні завдяки фінансовій підтримці Союзу
українців у Великій Британії. Автором було використано ряд фото та
архівних матеріалів, отриманих від О. Пулюя. На жаль, творчість і
життєвий шлях Ю. Гривняка є маловідомими в Україні, а доля зібраних
ним джерел потребує фахового дослідженняThese theses are devoted to the study of the pages of Yuriy
Hryvniak’s biography. He was the author of a monograph dedicated to the study
of the life and activities of the famous Ukrainian scientist and public figure Ivan
Puluj. The author used a number of photos and archival materials received from
O. Puluj. Unfortunately, the creativity and life path of Y. Hryvniak is little
known in Ukraine, and the fate of the sources collected by him requires
professional researc
Note from David Kirchman to Ivan Valiela at the Ecosystems Center
No full textTitle page of the book "Processes in Microbal Ecology". The author, David L. Kirchman, has written a note to Ecosystems Center scientist Ivan Valiela.Note reads: "Ivan- You & the MBL Marine Ecology course got me going in this field. Thanks. David Kirchman"photograph
Ivan Žuvela Šabo and His Etnographic Record from 1892
No full textU ovom tekstu otkriva se identitet autora jednog starijeg etnografskog zapisa nastalog na otoku Korčuli. Riječ je o rukopisu „Narodne pjesme junačke i žetelačke“ iz 1892., a koji se čuva u Arhivu Odsjeka za etnologiju Hrvatske akademije znanosti i umjetnosti u Zagrebu. Iako je u tom rukopisu autor potpisan kao „Ivan Žuvela, pravnik“, dosada ga se nije moglo točnije identificirati, iznesena je kriva pretpostavka, a čak se i spekuliralo da je riječ o pseudonimu. Istraživanjem dostupnih izvora i novinskih zapisa ipak se utvrdilo kako je zaista riječ o Velolučaninu Ivanu Žuveli iz grane Šabo, studentu prava koji je umro u svojoj 23-oj godini života, samo godinu dana po nastanku ovog rukopisa. Uz autora, u tekstu se detaljno progovara o rukopisu i njegovom iznimnom značaju za proučavanje nekadašnje svakodnevice, a posebno žetelačkih običaja na zapadnom dijelu otoka Korčule.This text reveals the identity of the hitherto unknown author one of the oldest known ethnographic record from the island of Korčula. The manuscript titled “Narodne pjesme junačke i žetelačke” (Folk Songs of Heroes and Harvesters) dates back to 1892 and is preserved in the Archive of the Ethnology Division at the Croatian Academy of Sciences and Arts in Zagreb. Although the author of the manuscript is signed as “Ivan Žuvela, legal scholar,” his precise identification has remained elusive, with incorrect assumptions and even speculation about a possible pseudonym. Through research of available sources and newspaper records, it has now been conclusively determined that the author is indeed Ivan Žuvela from Vela Luka, a member of the Šabo family, and a law student who passed away at the age of 23, just a year after creating this manuscript. In addition to introducing the author, this text provides a detailed exploration of the manuscript and its exceptional significance for studying the everyday life of the past, particularly the harvesting customs on the western part of the island of Korčula
Riflessioni su "Note su una teoria d'impresa" di Ivan Snehota
No full textIl capitolo ripercorre, riassume e discute i lavori scientifici del prof. Ivan Snehota a partire dalla monografia "Note su una teoria d'impresa" che contiene le basi del suo pensiero e del futuro lavoro di ricerca. Traendo spunto dagli studi del prof. Snehota l'Autore suggerisce percorsi di sviluppo della ricerca sulle reti tra imprese.The chapter summarizes and debates Emeritus prof. Ivan Snehota's studies since his Ph.D thesis. Following such an analysis the author suggests future research directions on the topic of business networks
Towards an Augmented Reality Game for Learning about Ivan Vazov's Literary Works
No full textThis paper presents a concept for a serious game based on an augmented reality representation of a mural artwork located in the National Library
“Ivan Vazov” in Plovdiv, Bulgaria. The mural features the renowned Bulgarian author Ivan Vazov in the center, surrounded by characters from his literary works.
By using a head-mounted display in front of the mural, the players would see movement of the characters and will be able to interact with them in a gamified augmented reality environment. The serious game proposed in this paper offers a solution to the engagement of players with literature and textual heritage within a broader cultural context
New data about Novgorod resident Ivan Shusherin the author of the biography of Patriarch Nikon
No full textThe article deals with the biography of Ivan Shusherin, the author of the “Life” of Patriarch Nikon. Based on new archival data, it was established the previously unknown circumstances of Ivan Shusherin’s ten-year stay in exile in Novgorod and his own letters, written in extremely beautiful handwriting are discovered. Analysis of the text of the “Life” allowed the author to clarify the dating of the “Life” and the intent of this work – the most important source on the history of the Russian church in the second half of the 17th century
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