Ambitwistor integrands from tensionless chiral superstring integrands
نویسندگان
چکیده
It is established that in the tensionless limit chiral superstring integrand reduced to of ambitwistor string.
منابع مشابه
Stochastic Calculus with Anticipating Integrands
We study the stochastic integral defined by Skorohod in [24] of a possibly anticipating integrand, as a function of its upper limit, and establish an extended It6 formula. We also introduce an extension of Stratonovich's integral, and establish the associated chain rule. In all the results, the adaptedness of the integrand is replaced by a certain smoothness requirement.
متن کاملCubature of Integrands Containing Derivatives
We present a new technique for the numerical integration over R a square or triangle of an integrand of the form ru B rv This uses only function values of u B and v avoiding ex plicit di erentiation but is suitable only when the integrand function is regular over R The technique is analogous to Romberg integration since it is based on using a sequence of very simple discretiza tions J m m of th...
متن کاملRadial quadrature for multiexponential integrands
We introduce a Gaussian quadrature, based on the polynomials that are orthogonal with respect to the weight function ln(2)x on the interval [0, 1], which is suitable for the evaluation of radial integrals. The quadrature is exact if the non-Jacobian part of the integrand is a linear combination of a geometric sequence of exponential functions. We find that the new scheme is a useful alternative...
متن کاملBayesian Optimization with Expensive Integrands
We propose a Bayesian optimization algorithm for objective functions that are sums or integrals of expensive-to-evaluate functions, allowing noisy evaluations. These objective functions arise in multi-task Bayesian optimization for tuning machine learning hyperparameters, optimization via simulation, and sequential design of experiments with random environmental conditions. Our method is averag...
متن کاملGaussian quadratures for oscillatory integrands
We consider a Gaussian type quadrature rule for some classes of integrands involving highly oscillatory functions of the form f (x) = f 1 (x) sin ζ x + f 2 (x) cos ζ x, where f 1 (x) and f 2 (x) are smooth, ζ ∈ R. We find weights σ ν and nodes x ν , ν = 1, 2,. .. , n, in a quadrature formula of the form 1 −1 f (x) dx ≈ n ν=1 σ ν f (x ν) such that it is exact for all polynomials f 1 (x) and f 2 ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of High Energy Physics
سال: 2021
ISSN: ['1127-2236', '1126-6708', '1029-8479']
DOI: https://doi.org/10.1007/jhep10(2021)171