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Колесников Александр Викторович

Факультет математики

Профиль на hse.ru ↗ тел.: +7 (495) 772-95-90 | 15337
Публикаций
89
Языков
2
Наград
6
Конференций
5
Профиль Публикации (89) Курсы (13)

Профессиональные интересы

Теория оптимальной транспортировкиуравнения Монже-АмпераСоболевские пространстваизопериметрическое неравенствобесконечномерный анализВыпуклая геометриягеометрические потокиэллиптические и параболические уравнения в частных производныханализ на римановых многообразияхГауссовы мерыстохастика

Должности

  • Заместитель декана по учебной работе — Факультет математики
  • профессор — Факультет математики
  • Ведущий научный сотрудник — Факультет компьютерных наук, Институт искусственного интеллекта и цифровых наук, Международная лаборатория стохастических алгоритмов и анализа многомерных данных

Био

  • · Начал работать в НИУ ВШЭ в 2009 году.
  • · Научно-педагогический стаж: 19 лет.

Образование

  • 2006 · Доктор физико-математических наук: Математический институт им. В.А. Стеклова РАН, специальность 01.01.00 «Математика»
  • 2003 · Кандидат наук: специальность 01.01.00 «Математика»
  • 2002 · Аспирантура: Московский государственный университет им. М.В. Ломоносова, факультет: механико-математический
  • 1999 · Специалитет: Московский государственный университет им. М.В. Ломоносова, факультет: механико-математический, специальность «Математика, прикладная математика», квалификация «Математик»

Опыт работы

  • · 2009: Работает в НИУ ВШЭ с года

Награды и поощрения

  • · Медаль "Признание - 10 лет успешной работы" НИУ ВШЭ (май 2022)
  • · Надбавка за публикации, вносящие особый вклад в международную научную репутацию НИУ ВШЭ (2024–2026, 2022–2025)
  • · Надбавка за публикацию в международном рецензируемом научном издании (2020–2021, 2018–2020)
  • · Надбавка за статью в зарубежном рецензируемом журнале (2014–2016, 2012–2014)
  • · Надбавка за статью в зарубежном рецензируемом научном издании (2016–2018)
  • · Лучший преподаватель — 2021, 2012

Гранты и проекты

  • — · на соискание учёной степени кандидата наук

Конференции (5)

Показать все
  • · 2018: Коллоквиум "Москва-Пиза" (Москва). Доклад: Logarithmic Minkowski problem and optimal transportation
  • · 2018: Коллоквиум "Москва-Пиза" (Москва). Доклад: Logarithmic Minkowski problem and optimal transportation
  • · 2017: Probability and Analysis 2017 (Będlewo). Доклад: On KLS conjecture for certain classes of convex sets
  • · 2016: Stochastic Partial Differential Equations and Related Fields (Bielefeld). Доклад: Sobolev estimates for mass transportation mappings with application to transport equations and spectral gap
  • · 2015: Algebraic structures in convex geometry (Москва). Доклад: On the Monge-Ampere equation, related metric-measure spaces, and isoperimetric inequalities for convex bodies

Идентификаторы исследователя

Публикации (89)

Beckmann's approach to multi-item multi-bidder auctions

2022 · PREPRINT · en

We consider the problem of revenue-maximizing Bayesian auction design with several i.i.d. bidders and several items. We show that the auction-design problem can be reduced to the problem of continuous optimal transportation introduced by Beckmann. We establish the strong duality between the two problems and demonstrate the existence of solutions. We then develop a new numerical approximation scheme that combines multi-to-single-agent reduction and the majorization theory insights to characterize the solution.

Pinsker inequalities and related Monge-Ampere equations for log-concave functions

2022 · ARTICLE · en

In this paper we further develop the theory of f-divergences for log-concave functions and their related inequalities. We establish Pinsker inequalities and new affine invariant entropy inequalities. We obtain new inequalities on functional affine surface area and lower and upper bounds for the Kullback-Leibler divergence in terms of functional affine surface area. The functional inequalities lead to new inequalities for L_p-affine surface areas for convex bodies.

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On the Gardner-Zvavitch conjecture: symmetry in inequalities of Brunn-Minkowski type

2021 · ARTICLE · en

In this paper, we study the conjecture of Gardner and Zvavitch from \cite{GZ}, which suggests that the standard Gaussian measure γ enjoys 1n-concavity with respect to the Minkowski addition of \textbf{symmetric} convex sets. We prove this fact up to a factor of 2: that is, we show that for symmetric convex K and L, γ(λK+(1−λ)L)12n≥λγ(K)12n+(1−λ)γ(L)12n. Further, we show that under suitable dimension-free uniform bounds on the Hessian of the potential, the log-concavity of even measures can be strengthened to p-concavity, with p>0, with respect to the addition of symmetric convex sets.

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On the Lp-Brunn–Minkowski and Dimensional Brunn–Minkowski Conjectures for Log-Concave Measures

2021 · ARTICLE · en

We study several of the recent conjectures in regards to the role of symmetry in the inequalities of Brunn-Minkowski type, such as the Lp-Brunn-Minkowski conjecture of Böröczky, Lutwak, Yang and Zhang, and the Dimensional Brunn-Minkowski conjecture of Gardner and Zvavitch, in a unified framework. We obtain several new results for these conjectures. We show that when K⊂L, the multiplicative form of the Lp-Brunn-Minkowski conjecture holds for Lebesgue measure for p≥1−Cn−0.75, which improves upon the estimate of Kolesnikov and Milman in the partial case when one body is contained in the other. We also show that the multiplicative version of the Lp-Brunn-Minkowski conjecture for the standard Gaussian measure holds in the case of sets containing sufficiently large ball (whose radius depends on p). In particular, the Gaussian Log-Brunn-Minkowski conjecture holds when K and L contain 0.5(n+1)−−−−−−−−√Bn2. We formulate an a-priori stronger conjecture for log-concave measures, extending both the Lp-Brunn-Minkowski conjecture and the Dimensional one, and verify it in the case when the sets are dilates and the measure is Gaussian. We also show that the Log-Brunn-Minkowski conjecture, if verified, would yield this more general family of inequalities. Our results build up on the methods developed by Kolesnikov and Milman as well as Colesanti, Livshyts, Marsiglietti. We furthermore verify that the local version of these conjectures implies the global version in the setting of general measures, and this step uses methods developed recently by Putterman

DOI ↗ PDF ↗

Pinsker inequalities and related Monge-Amp`ere equations for log-concave functions

2021 в печати · PREPRINT · en

We further develop the theory of f-divergences for log-concave functions and their related inequalities. We establish Pinsker inequalities, new affine invariant entropy inequalities and new inequalities on functional affine surface area The functional inequalities lead to new affine invariant inequalities for convex bodies. Equality characterizations in these inequalities are related to a Monge Amp`ere differential equation. We prove uniqueness of the solution of this equation.

Владимир Игоревич Богачев (к шестидесятилетию со дня рождения)

2021 · ARTICLE · ru

Это статья, посвященная шестидесятилетию В.И. Богачева

DOI ↗

Mass transportation functionals on the sphere with applications to the logarithmic Minkowski problem

2020 · ARTICLE · en

We study the transportation problem on the unit sphere Sn−1 for symmetric probability measures and the cost function c(x,y)=log1⟨x,y⟩. We calculate the variation of the corresponding Kantorovich functional K and study a naturally associated metric-measure space on Sn−1 endowed with a Riemannian metric generated by the corresponding transportational potential. We introduce a new transportational functional which minimizers are solutions to the symmetric log-Minkowski problem and prove that K satisfies the following analog of the Gaussian transportation inequality for the uniform probability measure σ on Sn−1: 1nEnt(ν)≥K(σ,ν). It is shown that there exists a remarkable similarity between our results and the theory of the K{ä}hler-Einstein equation on Euclidean space. As a by-product we obtain a new proof of uniqueness of solution to the log-Minkowski problem for the uniform measure.

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The multistochastic Monge-Kantorovich problem

2020 · PREPRINT · en

The multistsochastic Monge--Kantorovich problem on the product $X = \prod_{i=1}^n X_i$ of $n$ spaces is a generalization of the multimarginal Monge--Kantorovich problem. For a given integer number $1 \le k<n$ we consider the minimization problem $\int c d \pi \to \inf$ of the space of measures with fixed projections onto every $X_{i_1} \times \dots \times X_{i_k}$ for arbitrary set of $k$ indices $\{i_1, \dots, i_k\} \subset \{1, \dots, n\}$. In this paper we study basic properties of the multistochastic problem, including well-posedness, existence of a dual solution, boundedness and continuity of a dual solution.

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Extremal Kähler–Einstein Metric for Two-Dimensional Convex Bodies

2019 · ARTICLE · en

Given a convex body K⊂RnK⊂Rn with the barycenter at the origin, we consider the corresponding Kähler–Einstein equation e−Φ=detD2Φe−Φ=detD2Φ. If K is a simplex, then the Ricci tensor of the Hessian metric D2ΦD2Φ is constant and equals n−14(n+1)n−14(n+1). We conjecture that the Ricci tensor of D2ΦD2Φfor an arbitrary convex body K⊆RnK⊆Rn is uniformly bounded from above by n−14(n+1)n−14(n+1) and we verify this conjecture in the two-dimensional case. The general case remains open.

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On multistochastic Monge–Kantorovich problem, bitwise operations, and fractals

2019 · ARTICLE · en

The multistochastic (n, k)-Monge–Kantorovich problem on a product space ∏ni=1Xi∏i=1nXi is an extension of the classical Monge–Kantorovich problem. This problem is considered on the space of measures with fixed projections onto Xi1×⋯×XikXi1×⋯×Xik for all k-tuples {i1,…,ik}⊂{1,…,n}{i1,…,ik}⊂{1,…,n} for a given 1≤k

DOI ↗ PDF ↗

Курсы (13)