4,326 research outputs found
The Familial Grotesque in the Poetry of Shirley Geok-lin Lim
Framing the representation of the family in Shirley Lim’s poetry against the concept of the grotesque, this essay aims to demonstrate how the aesthetic category is arguably enlisted as a symbol referring to the trope – or more accurately, with particular members of the family– in order to mount a criticism against it, or less directly, the Confucian, male-biased symbolic order that underscores it. That the maternal-figure is most often transfigured as a grotesque embodiment in Lim’s poems is telling in its implication of the poet’s own ambivalent feelings towards her own mother whom she recognizes as a woman who illustrates empowering individualism but also reprehensibility. As such, while some of her poems express affirmation of the grotesque’s capacity for transgressing ideological borders and confusing distinctions, others are less celebratory of the concept, which they evoke explicitly to clarify the family’s monstrous dimensions
DCTNet : A Simple Learning-free Approach for Face Recognition
PCANet was proposed as a lightweight deep learning network that mainly
leverages Principal Component Analysis (PCA) to learn multistage filter banks
followed by binarization and block-wise histograming. PCANet was shown worked
surprisingly well in various image classification tasks. However, PCANet is
data-dependence hence inflexible. In this paper, we proposed a
data-independence network, dubbed DCTNet for face recognition in which we adopt
Discrete Cosine Transform (DCT) as filter banks in place of PCA. This is
motivated by the fact that 2D DCT basis is indeed a good approximation for high
ranked eigenvectors of PCA. Both 2D DCT and PCA resemble a kind of modulated
sine-wave patterns, which can be perceived as a bandpass filter bank. DCTNet is
free from learning as 2D DCT bases can be computed in advance. Besides that, we
also proposed an effective method to regulate the block-wise histogram feature
vector of DCTNet for robustness. It is shown to provide surprising performance
boost when the probe image is considerably different in appearance from the
gallery image. We evaluate the performance of DCTNet extensively on a number of
benchmark face databases and being able to achieve on par with or often better
accuracy performance than PCANet.Comment: APSIPA ASC 201
Higher Gauss sums of modular categories
The definitions of the Gauss sum and the associated central
charge are introduced for premodular categories and
. We first derive an expression of the Gauss sum of a
modular category , for any integer coprime to the order of the
T-matrix of , in terms of the first Gauss sum, the global
dimension, the twist and their Galois conjugates. As a consequence, we show for
these , the higher Gauss sums are -numbers and the associated central
charges are roots of unity. In particular, if is the Drinfeld
center of a spherical fusion category, then these higher central charges are 1.
We obtain another expression of higher Gauss sums for de-equivariantization and
local module constructions of appropriate premodular and modular categories.
These expressions are then applied to prove the Witt invariance of higher
central charges for pseudounitary modular categories.Comment: 26 pages. Typos and minor mistakes are corrected. Question 7.3 in the
previous version is answere
Optimal investment with inside information and parameter uncertainty
An optimal investment problem is solved for an insider who has access to noisy information related to a future stock price, but who does not know the stock price drift. The drift is filtered from a combination of price observations and the privileged information, fusing a partial information scenario with enlargement of filtration techniques. We apply a variant of the Kalman-Bucy filter to infer a signal, given a combination of an observation process and some additional information. This converts the combined partial and inside information model to a full information model, and the associated investment problem for HARA utility is explicitly solved via duality methods. We consider the cases in which the agent has information on the terminal value of the Brownian motion driving the stock, and on the terminal stock price itself. Comparisons are drawn with the classical partial information case without insider knowledge. The parameter uncertainty results in stock price inside information being more valuable than Brownian information, and perfect knowledge of the future stock price leads to infinite additional utility. This is in contrast to the conventional case in which the stock drift is assumed known, in which perfect information of any kind leads to unbounded additional utility, since stock price information is then indistinguishable from Brownian information
Subconvexity for modular form L-functions in the t aspect
Modifying a method of Jutila, we prove a t aspect subconvexity estimate for
L-functions associated to primitive holomorphic cusp forms of arbitrary level
that is of comparable strength to Good's bound for the full modular group, thus
resolving a problem that has been open for 35 years. A key innovation in our
proof is a general form of Voronoi summation that applies to all fractions,
even when the level is not squarefree.Comment: minor revisions; to appear in Adv. Math.; 30 page
- …