Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 1714 for “"invariant"”.
-
Invariant functionals
… I. A. Barnett gave a few examples of functionals invariant under one-parameter continuous groups of transformations in the space of continuous functions. The systematic study of functionals invariant under continuous groups of transformations in function space, and also the study of functionals …
-
Optimum Invariant Estimation
Made available in DSpace on 2014-12-05T22:27:20Z (GMT). No. of bitstreams: 1 0013492.pdf: 4383065 bytes, checksum: a1251b2b58be6276c90883c17a546562 (MD5) Previous issue date: 1955
-
Invariant Differential Positivity
… on such spaces allows for the generation of invariant cone fields, which in turn induce notions of conal orders. We propose differential positivity with respect to invariant cone fields as a natural and powerful generalisation of monotonicity to nonlinear spaces and develop the theory in this …
-
Group-invariant random processes
First we consider some isometry-invariant point process on Rd and examine what types of graphs can be defined on the points of the process in such a way that the point process and the graph have an equivariant distribution. We show that 1-ended trees and Zn can be achieved for invariant point …
-
Group-invariant CR mappings
We consider group-invariant CR mappings from spheres to hyperquadrics. Given a finite subgroup $\Gamma \subset U(n)$, a construction of D'Angelo and Lichtblau yields a target hyperquadric $Q(\Gamma)$ and a canonical non-constant CR map $h_{\Gamma} : S^{2n-1}/\Gamma \to Q(\Gamma)$. For every $\Gamma …
-
Invariant properties of conics
Made available in DSpace on 2017-11-30T22:46:23Z (GMT). No. of bitstreams: 2 5958112.pdf: 3158583 bytes, checksum: 2750057b61ed1f1fbd7e6fd7d4650f27 (MD5) license.txt: 4813 bytes, checksum: 715c4321821a960fa1a1e91d2ac7ebce (MD5) Previous issue date: 1896
-
Deformation-invariant sparse coding
Sparse coding represents input signals each as a sparse linear combination of a set of basis or dictionary elements where sparsity encourages representing each input signal with a few of the most indicative dictionary elements. In this thesis, we extend sparse coding to allow dictionary elements to …
-
Conformally invariant quantum fields
Thesis: Ph. D., Massachusetts Institute of Technology, Department of Mathematics, 1986
-
Color Invariant Skin Segmentation
This work addresses the problem of automatically detecting human skin in images without reliance on color information. Unlike previous methods, we present a new approach that performs well in the absence of such information. A key aspect of the work is that color-space augmentation is applied …
-
Shift and scale invariant preprocessor.
… and scale dependence by taking advantage of invariant properties of a Fourier transform followed by a Mellin transform. The preprocessor is realized using an FFT and a Mellin transform with a conventional error correction term. The error term proves to be indeterminate, but the error's bound …
-
RST invariant digital image watermarking
… novel digital image watermarking scheme that is invariant to rotation, scaling, and translation (RST). We embed watermark in the log-polar mapping (LPM) of the Fourier magnitude spectrum of original image, and use the phase correlation between the LPM of the original image and the LPM of the …
-
Pitchfork bifurcations of invariant manifolds
… the topological properties of fixed points and invariant manifolds of dynamical systems. A pitchfork bifurcation in R is said to have occurred when a stable fixed point becomes unstable and two new stable fixed points, separated by the unstable fixed point come into existence. In this thesis, a …
-
Invariant measures for inner functions
… in the upper half plane. Absolutely continuous invariant, measures for inner functions, ergodicity and exactness will be discussed. Moreover, under some conditions, we prove that the restriction of an inner function to [Special characters omitted.] is ergodic if and only if the Julia set is the …
-
Learning-based inductive invariant synthesis
The problem of synthesizing adequate inductive invariants to prove a program correct lies at the heart of automated program verification. We investigate, herein, learning approaches to synthesize inductive invariants of sequential programs towards automatically verifying them. To this end, we …
-
Invariant polynomials and machine learning
… the necessary tools from commutative algebra and invariant theory, we construct systematic methods to obtain sets of invariant variables that describe two such systems: particle physics and physical chemistry. In both cases, our systems are described by a collection of vectors. In the former, …
-
Gemoetric identities in invariant theory
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1995.
-
Testability of linear-invariant properties
… important role has been played by linearinvariant properties, i.e., properties of Boolean functions on the hypercube which are closed under linear transformations of the domain. Examples of such properties include linearity, homogeneousness, Reed-Muller codes, and Fourier sparsity. In …
-
Stable invariant subspaces, reflexivity, and BMO
… the third part of the thesis we study the stable invariant subspaces of Hilbert-space operators. We prove that if T is an operator on an infinite dimensional Hilbert space whose spectrum and essential spectrum are both connected and whose Fredholm index is only 0 or 1, then the only nontrivial …
Page 1 of 86