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In this short note we give a polynomial-time quantum reduction from the vectorization problem (DLP) to the parallelization problem (CDHP) for group actions. Combined with the trivial reduction from pa...
SeaSign: Compact isogeny signatures from class group actions
post-quantum crypto isogenies
2018/11/19
We give a new signature scheme for isogenies that combines the class group actions of CSIDH with the notion of Fiat-Shamir with aborts. Our techniques allow to have signatures of size less than one ki...
Pre- and post-quantum Diffie--Hellman from groups, actions, and isogenies
key exchange elliptic-curve cryptography isogenies
2018/11/13
Diffie--Hellman key exchange is at the foundations of public-key cryptography, but conventional group-based Diffie--Hellman is vulnerable to Shor's quantum algorithm. A range of ``post-quantum Diffie-...
ARAB-NORMAN HERITAGE: STATE OF KNOWLEDGE AND NEW ACTIONS AND INNOVATIVE PROPOSAL
Arab-norman architecture restoration geomatics cataloguing data-base
2017/6/20
This paper wants to offers a perlustrative recognition on the 'state of the studies', concerning to the Arab-Norman architecture of Palermo, admissed by Unesco in 2015 and explain a research in progre...
Ambivalence in desires and actions:the friendship in adulthood
friendship individuality competition adulthood
2016/1/26
This paper seeks to understand two important issues to the topic of emotions: the first question articulates the concept of friendship with adulthood and how this notion is perceived by individuals [m...
1- and 2-year-olds’ expectations about third-party communicative actions
Action understanding Third-party interactions
2015/12/21
Infants expect people to direct actions toward objects, and they respond to actions directed
to themselves, but do they have expectations about actions directed to third parties? In two
experiments,...
Strategic Actions to Value, Conserve, and Restore the Natural Capital of Megadiversity Countries: The Case of Mexico
ecosystem assessment, science–policy gaps
2015/11/13
Decisionmakers need updated, scientifically sound and relevant information to implement appropriate policy measures and make innovative
commitments to halt biodiversity loss and improve human well-b...
Benefiting From Misfortune:When Harmless Actions Are Judged to Be Morally Blameworthy
blame responsibility moral judgment character desires
2015/11/10
Dominant theories of moral blame require an individual to have caused or intended harm. However, the current four studies demonstrate cases where no harm is caused or intended, yet individuals are non...
CONFORMAL ACTIONS OF NILPOTENT GROUPS ON PSEUDO-RIEMANNIAN MANIFOLDS
CONFORMAL ACTIONS PSEUDO-RIEMANNIAN MANIFOLDS
2015/10/14
We study conformal actions of connected nilpotent Lie groups
on compact pseudo-Riemannian manifolds. We prove that if a type-(p,q)
compact manifold M supports a conformal action of a connected nilpo...
Isometric actions of Heisenberg groups on compact Lorentz manifolds
Heisenberg groupsl Lorentz manifolds
2015/10/14
We prove results toward classifying compact Lorentz manifolds on
which Heisenberg groups act isometrically. We give a general construction,
leading to a new example, of codimension-one actions—those...
ERGODICITY OF MAPPING CLASS GROUP ACTIONS ON SU(2)-CHARACTER VAR IET IES
GROUP ACTIONS MAPPING CLASS
2015/9/29
Let be a compact orientable surface with genus g andnboundary components
∂1,..., ∂n. Let b = (b1,...,bn) ∈ [−2,2]
n. Then the mapping class group
Mod() acts on the relative SU(2)-...
Proper affine actions and geodesic flows of hyperbolic surfaces
hyperbolic surfaces geodesic fl ows
2015/9/29
Let €0 O.2; 1/ be a Schottky group, and let † D H
2=€0 be the corresponding
hyperbolic surface. Let C.†/ denote the space of unit length geodesic currents
on †. The cohom...
The Margulis Invariant of Isometric Actions on Minkowski (2+1)-Space
Minkowski (2+1)-Space Isometric Actions
2015/9/29
Let E denote an a±ne space modelled on Minkowski (2+1)-space E
and let ¡ be a group of isometries whose linear part L(¡) is a purely hyperbolic
subgroup of SO0
(2;1). Margulis has deˉned ...
Actions,Adjuncts,and Agency
Actions Adjuncts Agency
2015/9/2
The event analysis of action sentences seems to be at odds with plausible (Davidsonian) views about how to count actions. If Booth pulled a certaintrigger, and thereby shot Lincoln, there is good reas...
Government Actions and Interventions, More Harm Than Good?
Government Actions Interventions
2015/8/3
IN THE SUMMER OF 2007 at the
annual Jackson Hole international
conference for central bankers
and financial officials I provided
evidence that excessively low
interest rates set by the United
St...