We compare different methods used for non-perturbative calculations in strongly interacting fermionic systems. Mean field theory shows a basic ambiguity related to the possibility to perform Fierz transformations. The results depend strongly on an unphysical parameter which reflects the choice of the mean field. Renormalization group equations in a partially bosonized setting can overcome this ...

An explicit projective embedding of the moduli space of marked cubic surfaces is given. This embedding is equivariant under the Weyl group of type E6. The image is defined by a system of linear and cubic equations. To express the embedding in a most symmetric way, the target would be 79-dimensional, however the image lies in a 9-dimensional linear subspace. 1 The moduli space of cubic surfaces ...

In this paper we present a technique for automatically generating constraints on parameter derivatives that reduce ambiguity in the behaviour prediction. Starting with a behaviour prediction using an initial library containing general domain knowledge the technique employs feedback about correct and incorrect states of behaviour and knowledge about the causal dependencies between the parameters...

This thesis will talk about ambiguity by classifying it into sound ambiguity and meaning ambiguity. In the first part, the author will discuss the theories in ambiguity namely the Q-and R-principle and IC-analysis which are the most basic and important in the analysis of ambiguity. In the following part, the author will analyze the sound ambiguity and meaning ambiguity in detail. Polysemy and h...

The object of this article is the analysis of asynchronous circuits for speed independence or delay insensitivity. The circuits are specified as a netlist of logic functions describing the components. The analysis is based on a derivation of an event specification of the circuit behavior in a form of a signal graph. Signal graphs can be viewed either as a formalization of timing diagrams, or as...

Ambiguity may lead us to insert abstractions into our experience that create a greater number of unanticipated, unintended consequences. When people move closer to the flux of ambiguity, they work to make sense of it. High reliability organizations react to ambiguity by increasing it momentarily. To increase ambiguity is to grasp more of the situation, to refrain from simplifications, and to st...

This paper considers the impact of ambiguity in strategic situations. It extends the existing literature on games with ambiguity-averse players by allowing for optimistic responses to ambiguity. We use the CEU model of ambiguity with a class of capacities introduced by Jaffray and Philippe (1997), which allows us to distinguish ambiguity from ambiguity-attitude, and propose a new solution conce...