杨童鸥
助理教授
yangto@sustech.edu.cn
I am currently working on the following topics:
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Decoupling theory for various geometric objects in the Euclidean space.
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Curved Kakeya problems and their related maximal operators.
Theses:
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Kakeya and restriction problems in harmonic analysis (my master thesis, 2017): Link
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Configurations and decoupling: a few problems in Euclidean harmonic analysis (my PhD thesis, 2021): Link
Notes/Slides:
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Study guide for "On restriction projections to planes in $\mathbb R^3$", with Tainara Borges and Siddharth Mulherkar, (2024), Link
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A Study Guide for A Study Guide for the l^2 decoupling Theorem by Bourgain and Demeter (2016) (Link to [Bourgain-Demeter]) and (Link to my note)
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A few remarks on decoupling (Link)
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Equivalence of decoupling constants (Link)
I am teaching MA127 (Calculus II) in Fall 2025 at SUSTech. Below are courses I have previously taught elsewhere (some courses were taught more than once):
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Linear Algebra and Applications (MATH 33A) UCLA 2025
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Differential Geometry (MATH 120A) UCLA 2025
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Complex Analysis for Applications (MATH 132) UCLA 2025
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Linear Algebra and Applications (MATH 33A) UCLA 2024
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Linear Algebra and Applications (MATH 33A) UCLA 2024
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Complex Analysis for Applications (MATH 132) UCLA 2023
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Elementary Topology (MATH 551) UW-Madison 2023
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Analysis I (MATH 521) UW-Madison 2022
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Introduction to Complex Variables (MATH 300) UBC 2022
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Integral Calculus with Applications to Commerce and Social Sciences (MATH 105) UBC 2019
Publications:
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(Joint with Yue Zhong) Construction of a curved Kakeya set, Bulletin of the London Mathematical Society, 2025, https://doi.org/10.1112/blms.70110
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(Joint with Malabika Pramanik and Joshua Zahl) A Kaufman type restricted projection theorem in R3 (2022), and a Kaufman-type restricted projection theorem in R^3, accepted by American Journal of Mathematics in 2024, arXiv:2207.02259
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(Joint with Jianhui Li) Decoupling for smooth surfaces in R3 (2021), accepted by American Journal of Mathematics in 2023, arxiv:2110.08441
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(Joint with Jianhui Li) Decoupling for mixed-homogeneous polynomials in R3. Mathematische Annalen, 2022, https://link.springer.com/article/10.1007/s00208-021-02273-9
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Uniform l2-decoupling in R2 for polynomials. Journal of Geometric Analysis, 2021, https://doi.org/10.1007/s12220-021-00666-5
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On sets containing an affine copy of bounded decreasing sequences. Journal of Fourier Analysis and Applications, 2020, https://doi.org/10.1007/s00041-020-09780-4.
Preprints:
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(Joint with Jianhui Li) Decoupling for degenerate hypersurfaces (2025), arxiv:2507.02134
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(Joint with Jianhui Li) Decoupling for surfaces with radial symmetry (2025), arxiv:2504.17100
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(Joint with Xianghong Chen and Yue Zhong) Improved packing of hypersurfaces in Rd (2025), arxiv:2501.03532
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(Joint with Jianhui Li) Two principles of decoupling (2024), arxiv:2407.16108
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(Joint with Mingfeng Chen and Shaoming Guo) A multi-parameter cinematic curvature (2023), arxiv:2306.01606