• their model. This article deals primarily with the quantization of the non-linear sigma model; please refer to the base article on the sigma model for general...
    10 KB (1,288 words) - 12:04, 21 November 2024
  • "non-linear sigma model". The name has roots in particle physics, where a sigma model describes the interactions of pions. Unfortunately, the "sigma meson"...
    22 KB (4,133 words) - 21:46, 25 November 2024
  • Skyrmion (redirect from Skyrme model)
    stable field configuration of a certain class of non-linear sigma models. It was originally proposed as a model of the nucleon by (and named after) Tony Skyrme...
    25 KB (3,176 words) - 10:28, 29 October 2024
  • Scalar, spinor and gauge Standard Model Chiral model Non-linear sigma model Wess–Zumino–Witten model Wess–Zumino model Supersymmetric Yang–Mills 4D N =...
    3 KB (276 words) - 11:26, 11 August 2024
  • Thumbnail for Paul Wiegmann
    solutions of O(3) Non-linear Sigma Model, (Wiegmann 1985), Wess–Zumino–Witten model (together with Alexander Polyakov), Anderson impurity model and multi-channel...
    5 KB (382 words) - 07:35, 22 March 2024
  • functions, especially the sigma function or sum-of-divisors function. In applied mathematics, σ(T) denotes the spectrum of a linear map T. In complex analysis...
    16 KB (2,093 words) - 17:37, 17 December 2024
  • Multilevel models (also known as hierarchical linear models, linear mixed-effect models, mixed models, nested data models, random coefficient, random-effects...
    33 KB (4,920 words) - 05:18, 27 October 2024
  • Non-linear least squares is the form of least squares analysis used to fit a set of m observations with a model that is non-linear in n unknown parameters...
    28 KB (4,538 words) - 23:33, 12 October 2024
  • Thumbnail for Linear discriminant analysis
    in that they both look for linear combinations of variables which best explain the data. LDA explicitly attempts to model the difference between the classes...
    46 KB (5,986 words) - 10:54, 8 November 2024
  • world-sheet Σ {\displaystyle \Sigma } is then an embedded surface, that is, an embedded 2-manifold Σ ↪ M {\displaystyle \Sigma \hookrightarrow M} , such that...
    4 KB (524 words) - 21:03, 22 November 2024
  • Thumbnail for Simple linear regression
    In statistics, simple linear regression (SLR) is a linear regression model with a single explanatory variable. That is, it concerns two-dimensional sample...
    32 KB (5,326 words) - 06:13, 17 October 2024
  • gravitons having non-zero mass. Most theories containing gravitons suffer from severe problems. Attempts to extend the Standard Model or other quantum...
    21 KB (2,306 words) - 17:00, 30 November 2024
  • Thumbnail for Calabi–Yau manifold
    Calabi–Yau manifolds are compact, but some allow them to be non-compact. In the generalization to non-compact manifolds, the difference ( Ω ∧ Ω ¯ − ω n / n...
    24 KB (3,270 words) - 15:59, 4 November 2024
  • equation is a nonlinear variation of the Schrödinger equation. Non-linear sigma model is found in quantum field theory. Nonlinear system, in mathematics...
    3 KB (503 words) - 05:53, 8 May 2024
  • a reading of the latter paper shows that it is actually concerned with linear dilation backgrounds, not Dirichlet boundary conditions). This paper, though...
    22 KB (3,291 words) - 01:53, 21 September 2024
  • The Ogden material model is a hyperelastic material model used to describe the non-linear stress–strain behaviour of complex materials such as rubbers...
    5 KB (919 words) - 10:36, 6 March 2024
  • using similar techniques. When viewed in the generalized linear model framework, the probit model employs a probit link function. It is most often estimated...
    20 KB (3,255 words) - 05:11, 5 September 2024
  • vector space V over a field F is the moduli space of all k-dimensional linear subspaces of V. Whenever there is an embedding of a scheme X {\displaystyle...
    28 KB (4,048 words) - 18:33, 6 February 2024
  • field with imaginary mass. However, it was soon realized that Feinberg's model did not in fact allow for superluminal (faster-than-light) particles or...
    30 KB (3,263 words) - 17:00, 18 December 2024
  • later case, this is referred to as the O ( n ) {\displaystyle O(n)} non-linear sigma model, as the rotation group O ( n ) {\displaystyle O(n)} is group of...
    6 KB (1,097 words) - 14:15, 5 June 2024
  • In statistics, linear regression is a model that estimates the linear relationship between a scalar response (dependent variable) and one or more explanatory...
    75 KB (10,428 words) - 22:33, 21 December 2024
  • sampling variance within the class of linear unbiased estimators, if the errors in the linear regression model are uncorrelated, have equal variances...
    28 KB (4,717 words) - 20:27, 24 November 2024
  • Thumbnail for Brane cosmology
    dimension, and then no reference to the bulk is appropriate. In the bulk model, at least some of the extra dimensions are extensive (possibly infinite)...
    11 KB (1,207 words) - 19:51, 16 September 2024
  • 77. Rickles 2014, p. 11 n. 22. Scherk, J.; Schwarz, J. (1974). "Dual models for non-hadrons". Nuclear Physics B. 81 (1): 118–144. Bibcode:1974NuPhB..81...
    34 KB (4,199 words) - 10:39, 30 November 2024
  • Thumbnail for Chiral model
    \ldots \rangle } denotes the trace in the flavor space. This is a non-linear sigma model. Terms involving ∂ μ ∂ μ U {\displaystyle \textstyle \partial _{\mu...
    19 KB (3,202 words) - 07:32, 24 September 2024
  • ,\cdot ]\otimes {\operatorname {id} }\circ ({\operatorname {id} }+\sigma +\sigma ^{2})=0} where σ is the cyclic permutation braiding ( id ⊗ τ A , A )...
    15 KB (2,397 words) - 18:50, 11 October 2024
  • _{j}X_{j}^{i};\quad \sigma _{i+1}^{2}={\frac {1}{M_{i}-1}}\sum _{j}(X_{j}^{i}-\mu _{i+1})^{2}.} Leading to a conditionally normal next generation model X j i + 1...
    17 KB (2,438 words) - 17:14, 17 December 2024
  • F-theory String field theory Matrix string theory Non-critical string theory Non-linear sigma model Tachyon condensation RNS formalism GS formalism String...
    5 KB (611 words) - 20:14, 30 December 2023
  • useful to mitigate the problem of multicollinearity in linear regression, which commonly occurs in models with large numbers of parameters. In general, the...
    31 KB (4,024 words) - 15:43, 21 November 2024
  • The standard linear solid (SLS), also known as the Zener model after Clarence Zener, is a method of modeling the behavior of a viscoelastic material using...
    8 KB (1,312 words) - 10:29, 11 November 2024