5,842 research outputs found
-adic -functions of Bianchi modular forms
The theory of overconvergent modular symbols, developed by Rob Pollack and
Glenn Stevens, gives a beautiful and effective construction of the -adic
-function of a modular form. In this paper, we give an analogue of their
results for Bianchi modular forms, that is, modular forms over imaginary
quadratic fields. In particular, we prove control theorems that say that the
canonical specialisation map from overconvergent to classical Bianchi modular
symbols is an isomorphism on small slope eigenspaces of suitable Hecke
operators. We also give an explicit link between the classical modular symbol
attached to a Bianchi modular form and critical values of its -function,
which then allows us to construct -adic -functions of Bianchi modular
forms.Comment: 41 pages. I have relaxed a condition, previously assumed throughout,
that the primes above p are principal. I have also made various minor
improvements and corrections throughou
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CatÊgorisation et stigmatisation policières å Sheffield au milieu du XIXe siècle [Numbering crimes and measuring space: policing Sheffield in the mid-nineteenth century]
The city in the nineteenth century was often defined as a place of crime: yet from within, the its authorities sought to represent crime as something external to it. The presentation of the criminal statistical returns of the English city of Sheffield can be shown to be distorted in several ways, all of which were consistent with the project of rendering the criminal as firmly 'other'. The town's returns followed the national requirement of establishing numbers of 'resident criminals' and their haunts, but it also went beyond this. Information about residence, ethnicity and literacy was presented in a way that tried to set a boundary between the 'true' city and the people in it who were deemed to be committing the majority of crime. The tactic of labelling was pursued in an effort to symbolically isolate a discrete 'criminal class'. In addition, the mania for sub-division of certain sorts of crime replaced worryingly large numbers of total crimes committed with reassuringly small numbers of crimes that fell into small sub-categories. The returns were a conscious project to create an image of an incorruptible and professional police force successfully securing and thus separating the city from a crime threat that was mainly external, 'alien' or safely under surveillance
P-adic Asai L-functions of Bianchi modular forms
The Asai (or twisted tensor) -function of a Bianchi modular form is
the -function attached to the tensor induction to of its
associated Galois representation. In this paper, when is ordinary at
we construct a -adic analogue of this -function: that is, a -adic
measure on that interpolates the critical values of the
Asai -function twisted by Dirichlet characters of -power conductor. The
construction uses techniques analogous to those used by Lei, Zerbes and the
first author in order to construct an Euler system attached to the Asai
representation of a quadratic Hilbert modular form.Comment: Final version, to appear in Algebra & Number Theor
Protect our pubs!
Protect Our Pubs! is a project examining the notion of the nationalisation of pubs by the state. It involved a protest, audio tours of the pub, posters protesting at the notion, a contest for the smartest barperson, peg drinking contest, a flighting contest and various documentation. The protest and subsequent events took place at the Hare & Hounds Pub in the Midlands
Working together, driven apart: Reflecting on a joint endeavour to address sustainable development within a university
A holistic and transformational approach to Sustainable Development within a university requires systemic change and embraces new ways of working. Champions must challenge silo mentalities, develop new processes to encourage synergies across university functions, and strive to re-align systems and goals towards the common endeavour of sustainability. But how easy is this to achieve? It is well documented that working across disciplines presents challenges but forging a synergistic relationship between the environmental management function of Estates and an academic champion for ESD is not only logical but might be an easier place to explore how two roles can work together to achieve change. This paper provides a reflective account of such an alliance, outlining a joint endeavour to address sustainable development. An analysis is provided of those factors which impede such working and the different role tensions that make working together challenging. It will also consider the benefits of collaboration, as the perspectives from the operational and academic domains provide a broader context for understandings, access to different forums, an ability to tackle conflicting agendas together and an opportunity to genuinely effect change, providing mutual support through shared perseverance. The paper will conclude by questioning the extent to which progress made will endure, if the benefits of this synergy are not acknowledged by university leadership
OB associations and giant molecular clouds in the galaxy
Giant molecular clouds (GMC's) are the sites of all OB star formation in the Galaxy. These OB stars typically form in large associations and photoionize the surrounding gas, eventually destroying the clouds from which they were born. CO surveys have revealed the distribution of GMC's in the Galaxy, and radio observations provide data on the distribution of associations. These results are extrapolated to determine Galactic mean distribution functions of each and then combined to determine how GMC's and OB associations are correlated. The resulting probability distribution of luminosity given cloud mass implies that although most of the molecular mass of the Galaxy is in massive star forming complexes, a large number of clouds above which massive star formation is extremely likely and abundant and below which it is almost certainly absent
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Design Synthesis of Adaptive Mesoscopic Cellular Structures with Unit Truss Approach and Particle Swarm Optimization Algorithm
Cellular material structures have been engineered at the mesoscopic scale for high performance
and multifunctional capabilities. However, the design of adaptive cellular structures - structures with
cellular configurations, sizes, and shapes designed for a specific geometric and loading context - has
not been sufficiently investigated. In this paper, the authors present a design synthesis method with the
use of unit truss approach and particle swarm optimization algorithm to design adaptive cellular
structures. A critical review is presented to show the pros and cons of the new design synthesis method
and an existing homogenization method. The research extends the application of additive
manufacturing in the design of new materials for high performances and benefits its long-term growth.Mechanical Engineerin
Families of Bianchi modular symbols: critical base-change p-adic L-functions and p-adic Artin formalism
Let be an imaginary quadratic field. In this article, we study the
eigenvariety for GL(2)/K, proving an etaleness result for the weight map at
non-critical classical points and a smoothness result at base-change classical
points. We give three main applications of this; let be a regular
-stabilised newform of weight at least 2 without CM by . (1) We
construct a two-variable -adic -function attached to the base-change of
to under assumptions on that we conjecture always hold, in
particular making no assumption on the slope of . (2) We construct
three-variable -adic -functions over the eigenvariety interpolating the
-adic -functions of classical base-change Bianchi cusp forms in families.
(3) We prove that these base-change -adic -functions satisfy a -adic
Artin formalism result, that is, they factorise in the same way as the
classical -function under Artin formalism.
In an appendix, Carl Wang-Erickson describes a base-change deformation
functor and gives a characterisation of its Zariski tangent space.Comment: 26 pages, with a 3 page appendix by Carl Wang-Erickson. Comments
welcome! Changes for v5: added contents, minor changes to exposition. v4:
corrected funding acknowledgements. v3: This version has a new introduction,
has been reorganised and greatly shortened, and incorporates minor
corrections. v2: minor correction
Matching matched filtering with deep networks in gravitational-wave astronomy
We report on the construction of a deep convolutional neural network that can
reproduce the sensitivity of a matched-filtering search for binary black hole
gravitational-wave signals. The standard method for the detection of well
modeled transient gravitational-wave signals is matched filtering. However, the
computational cost of such searches in low latency will grow dramatically as
the low frequency sensitivity of gravitational-wave detectors improves.
Convolutional neural networks provide a highly computationally efficient method
for signal identification in which the majority of calculations are performed
prior to data taking during a training process. We use only whitened time
series of measured gravitational-wave strain as an input, and we train and test
on simulated binary black hole signals in synthetic Gaussian noise
representative of Advanced LIGO sensitivity. We show that our network can
classify signal from noise with a performance that emulates that of match
filtering applied to the same datasets when considering the sensitivity defined
by Reciever-Operator characteristics.Comment: 5 pages, 3 figures, submitted to PR
Staging Transformations for Multimodal Web Interaction Management
Multimodal interfaces are becoming increasingly ubiquitous with the advent of
mobile devices, accessibility considerations, and novel software technologies
that combine diverse interaction media. In addition to improving access and
delivery capabilities, such interfaces enable flexible and personalized dialogs
with websites, much like a conversation between humans. In this paper, we
present a software framework for multimodal web interaction management that
supports mixed-initiative dialogs between users and websites. A
mixed-initiative dialog is one where the user and the website take turns
changing the flow of interaction. The framework supports the functional
specification and realization of such dialogs using staging transformations --
a theory for representing and reasoning about dialogs based on partial input.
It supports multiple interaction interfaces, and offers sessioning, caching,
and co-ordination functions through the use of an interaction manager. Two case
studies are presented to illustrate the promise of this approach.Comment: Describes framework and software architecture for multimodal web
interaction managemen
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