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   Articles with "recursion" as a keyword



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Recursion relations for anomalous dimensions in the 6d (2, 0) theory

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recommendations! Published in 2019 at "Journal of High Energy Physics"

DOI: 10.1007/jhep04(2019)038

Abstract: A bstractWe derive recursion relations for the anomalous dimensions of double-trace operators occurring in the conformal block expansion of four-point stress tensor correlators in the 6d (2, 0) theory, which encode higher-derivative corrections to supergravity… read more here.

Keywords: dimensions theory; relations anomalous; recursion; recursion relations ... See more keywords
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Notes on the solutions of Zamolodchikov-type recursion relations in Virasoro minimal models

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recommendations! Published in 2018 at "Journal of High Energy Physics"

DOI: 10.1007/jhep08(2018)183

Abstract: A bstractWe study Virasoro minimal-model 4-point conformal blocks on the sphere and 0-point conformal blocks on the torus (the Virasoro characters), as solutions of Zamolodchikov-type recursion relations. In particular, we study the singularities due to… read more here.

Keywords: type recursion; virasoro minimal; solutions zamolodchikov; zamolodchikov type ... See more keywords
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Generalisations of the Harer–Zagier recursion for 1-point functions

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recommendations! Published in 2021 at "Journal of Algebraic Combinatorics"

DOI: 10.1007/s10801-020-01003-9

Abstract: Harer and Zagier proved a recursion to enumerate gluings of a $2d$-gon that result in an orientable genus $g$ surface, in their work on Euler characteristics of moduli spaces of curves. Analogous results have been… read more here.

Keywords: harer zagier; recursion; generalisations harer; point ... See more keywords
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Self-similarity and recursion as default modes in human cognition

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recommendations! Published in 2017 at "Cortex"

DOI: 10.1016/j.cortex.2016.08.016

Abstract: Humans generate recursive hierarchies in a variety of domains, including linguistic, social and visuo-spatial modalities. The ability to represent recursive structures has been hypothesized to increase the efficiency of hierarchical processing. Theoretical work together with… read more here.

Keywords: self similarity; processing; default; information processing ... See more keywords
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Lax pairs, recursion operators and bi-Hamiltonian representations of (3+1)-dimensional Hirota type equations

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recommendations! Published in 2019 at "Journal of Geometry and Physics"

DOI: 10.1016/j.geomphys.2018.11.008

Abstract: Abstract We consider (3+1)-dimensional second-order evolutionary PDEs where the unknown u enters only in the form of the 2nd-order partial derivatives. For such equations which possess a Lagrangian, we show that all of them have… read more here.

Keywords: lax pairs; form; pairs recursion; recursion operators ... See more keywords
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Horizontal recursion in soft OR

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recommendations! Published in 2019 at "Journal of the Operational Research Society"

DOI: 10.1080/01605682.2017.1421847

Abstract: Abstract In operational research (OR), the concept of recursion explains particular relationships between modelled systems. It clarifies how the same system properties are replicated vertically across hierarchically interdependent units, meaning these units should be amenable… read more here.

Keywords: horizontal recursion; recursion soft; recursion;
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A basic recursion concept inventory

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recommendations! Published in 2017 at "Computer Science Education"

DOI: 10.1080/08993408.2017.1414728

Abstract: Recursion is both an important and a difficult topic for introductory Computer Science students. Students often develop misconceptions about the topic that need to be diagnosed and corrected. In this paper, we report on our… read more here.

Keywords: recursion concept; concept inventory; basic recursion; recursion ... See more keywords
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BTRecurTutor: a tutorial for practicing recursion in binary trees

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recommendations! Published in 2020 at "Computer Science Education"

DOI: 10.1080/08993408.2020.1714533

Abstract: ABSTRACT Background and Context Recursion in binary trees has proven to be a hard topic. There was not much research on enhancing student understanding of this topic. Objective We present a tutorial to enhance learning… read more here.

Keywords: binary trees; btrecurtutor tutorial; tutorial practicing; practicing recursion ... See more keywords
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Repeated application of the recursion operator for a new hierarchy of negative-order integrable KdV equations

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recommendations! Published in 2020 at "Waves in Random and Complex Media"

DOI: 10.1080/17455030.2018.1506595

Abstract: ABSTRACT In this work we use the repeated application of the recursion operator to establish a new hierarchy of negative-order integrable KdV equations of higher orders. The concept of the inverse recursion operator allows us… read more here.

Keywords: recursion operator; new hierarchy; repeated application; recursion ... See more keywords
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Recursion and Hamiltonian operators for integrable nonabelian difference equations

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recommendations! Published in 2020 at "Nonlinearity"

DOI: 10.1088/1361-6544/aba88c

Abstract: In this paper, we carry out the algebraic study of integrable differential-difference equations whose field variables take values in an associative (but not commutative) algebra. We adapt the Hamiltonian formalism to nonabelian difference Laurent polynomials… read more here.

Keywords: difference; integrable nonabelian; difference equations; nonabelian difference ... See more keywords
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A Preliminary Instrument for Measuring Students’ Subjective Perceptions of Difficulties in Learning Recursion

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recommendations! Published in 2018 at "IEEE Transactions on Education"

DOI: 10.1109/te.2017.2758346

Abstract: Contribution: Findings are provided from an initial survey to evaluate the magnitude of the recursion problem from the student point of view.Background: A major difficulty that programming students must overcome—the learning of recursion—has been addressed… read more here.

Keywords: instrument; survey; preliminary instrument; instrument measuring ... See more keywords