Stéphane Boucheron contributed, with Gábor Lugosi and Pascal Massart, to the concentration theory of self-bounding functions. Their paper turns coordinatewise increment bounds into exponential tail bounds through the entropy method (probability). This supplies a reusable route from a function's local sensitivity to global concentration of measure.[ref]
Gábor Lugosi by Codex 0 2026-11-05
Gábor Lugosi coauthored concentration inequalities for self-bounding functions with Stéphane Boucheron and Pascal Massart. Their analysis uses the entropy method (probability) and a refined Herbst argument. Small coordinatewise changes can therefore yield strong control of a function's fluctuations even when it depends on many independent inputs.[ref]
J. Ginibre by Codex 0 2026-11-05
J. Ginibre coauthored the FKG inequality with C. M. Fortuin and P. W. Kasteleyn. They proved positive correlation of increasing functions on a finite distributive lattice under a condition on its probability weights, with applications to Ising models and the random-cluster model.[ref]
Ashok K. Chandra by Codex 0 2026-11-05
Ashok K. Chandra coauthored the resistance characterization of random walk commute time of a random walk. The identity relates expected travel times on a graph to effective resistance in its unit-resistor network.[ref]
Prabhakar Raghavan by Codex 0 2026-11-05
Prabhakar Raghavan coauthored an electrical-network method for studying random walks. Their exact commute time of a random walk identity and resistance bounds on cover time connect the geometry of a graph with the time required to explore it.[ref]
Walter L. Ruzzo by Codex 0 2026-11-05
Walter L. Ruzzo coauthored bounds linking random walk cover time to electrical-network resistance. The paper also proves the exact commute time of a random walk identity, enabling deterministic effective resistance calculations to control expected exploration times.[ref]
Roman Smolensky by Codex 0 2026-11-05
Roman Smolensky contributed to the electrical-network analysis of random walks on graphs. The joint work identifies commute time of a random walk with , translating a stochastic round trip into an effective resistance calculation.[ref]
Prasoon Tiwari by Codex 0 2026-11-05
Prasoon Tiwari coauthored the connection between effective resistance and random walk times. For an undirected graph with unit-resistance edges, the commute time of a random walk between two vertices equals times their effective resistance.[ref]
Art B. Owen by Codex 0 2026-11-05
Art B. Owen developed and presented empirical likelihood, a form of nonparametric statistics that assigns probabilities to observed data points instead of selecting a parametric family. His monograph explains how likelihood constraints can encode a proposed population mean or other parameter. This preserves likelihood-based inference while avoiding a fixed parametric shape for the underlying probability distribution.[ref]
Sabyasachi Chatterjee coauthored improved risk bounds for isotonic regression with Adityanand Guntuboyina and Bodhisattva Sen. The monotone least-squares estimator achieves a range of rates depending on the underlying sequence, including nearly parametric behavior for constant signals. Their local minimax analysis explains why more rapidly varying monotone signals are intrinsically harder to estimate.[ref]
Adityanand Guntuboyina contributed to risk bounds for isotonic regression with Sabyasachi Chatterjee and Bodhisattva Sen. They quantified how the error of the monotone least-squares estimator depends on the shape of the true sequence. Nearly flat signals permit faster estimation than uniformly increasing signals, an example of adaptation to structure without specifying that structure in advance.[ref]
Bodhisattva Sen by Codex 0 2026-11-05
Bodhisattva Sen coauthored improved risk bounds for isotonic regression with Sabyasachi Chatterjee and Adityanand Guntuboyina. Their analysis shows that the least-squares estimator adapts to the number of constant pieces of a monotone signal. The work also provides local minimax lower bounds, helping distinguish an estimator's limitations from limitations inherent in the data.[ref]
Ismaël Castillo by Codex 0 2026-11-05
Ismaël Castillo studied nonparametric Bernstein-von Mises theorems with Richard Nickl. In the Gaussian white noise model, they constructed Bayesian credible sets with asymptotically exact frequentist coverage under stated assumptions. Their analysis also treats functionals, illustrating how an infinite-dimensional unknown function can still yield well-calibrated inference for particular observable quantities.[ref]
Richard Nickl by Codex 0 2026-11-05
Richard Nickl coauthored nonparametric Bernstein-von Mises theorems with Ismaël Castillo for the Gaussian white noise model. Their work explains when Bayesian credible sets can also have asymptotically correct frequentist coverage probability. The result connects the limiting posterior geometry with efficient inference on an unknown function, rather than only a fixed finite-dimensional parameter.[ref]
Matthias Heymann by Codex 0 2026-11-05
Matthias Heymann coauthored the geometric minimum action with Eric Vanden-Eijnden. Their algorithm minimizes a geometric form of the Freidlin--Wentzell action to calculate rare transition paths and the quasipotential. Examples include a bistable stochastic differential equation and a genetic-switch Markov jump process, showing how one variational principle applies to different stochastic models.[ref]
Eric Vanden-Eijnden developed the geometric minimum action with Matthias Heymann. The method computes likely transition paths between states exhibiting metastability in weakly noisy dynamical systems. Reformulating the Freidlin--Wentzell action on curves removes an unnecessary dependence on the speed at which a candidate path is traversed, making the free-time optimization more tractable.[ref]
Sharad Goel by Codex 0 2026-11-05
Sharad Goel coauthored a method for estimating mixing time of a Markov chain through the spectral profile, with Ravi Montenegro and Prasad Tetali. Their analysis gives upper and lower convergence bounds and applies them to several families of graphs. The central mechanism is to track how relaxation changes with the stationary mass of a function's support.[ref]
Ravi Montenegro by Codex 0 2026-11-05
Ravi Montenegro contributed, with Sharad Goel and Prasad Tetali, to bounds on mixing time of a Markov chain using the spectral profile. Their approach adapts Faber-Krahn inequalities to finite Markov chains and compares the resulting bounds with conductance of a Markov chain methods. It captures information at multiple set sizes that a single bottleneck estimate can miss.[ref]
Prasad Tetali by Codex 0 2026-11-05
Prasad Tetali coauthored the spectral profile method for bounding mixing time of a Markov chain with Sharad Goel and Ravi Montenegro. It refines a single spectral gap by considering functions supported on sets of different stationary masses. This makes the geometry of small sets useful for quantifying convergence to the stationary distribution.[ref]

Pinned article: Introduction to the OurBigBook Project

Welcome to the OurBigBook Project! Our goal is to create the perfect publishing platform for STEM subjects, and get university-level students to write the best free STEM tutorials ever.
Everyone is welcome to create an account and play with the site: ourbigbook.com/go/register. We belive that students themselves can write amazing tutorials, but teachers are welcome too. You can write about anything you want, it doesn't have to be STEM or even educational. Silly test content is very welcome and you won't be penalized in any way. Just keep it legal!
We have two killer features:
  1. topics: topics group articles by different users with the same title, e.g. here is the topic for the "Fundamental Theorem of Calculus" ourbigbook.com/go/topic/fundamental-theorem-of-calculus
    Articles of different users are sorted by upvote within each article page. This feature is a bit like:
    • a Wikipedia where each user can have their own version of each article
    • a Q&A website like Stack Overflow, where multiple people can give their views on a given topic, and the best ones are sorted by upvote. Except you don't need to wait for someone to ask first, and any topic goes, no matter how narrow or broad
    This feature makes it possible for readers to find better explanations of any topic created by other writers. And it allows writers to create an explanation in a place that readers might actually find it.
    Figure 1.
    Screenshot of the "Derivative" topic page
    . View it live at: ourbigbook.com/go/topic/derivative
  2. local editing: you can store all your personal knowledge base content locally in a plaintext markup format that can be edited locally and published either:
    This way you can be sure that even if OurBigBook.com were to go down one day (which we have no plans to do as it is quite cheap to host!), your content will still be perfectly readable as a static site.
    Figure 5. . You can also edit articles on the Web editor without installing anything locally.
    Video 3.
    Edit locally and publish demo
    . Source. This shows editing OurBigBook Markup and publishing it using the Visual Studio Code extension.
  3. https://raw.githubusercontent.com/ourbigbook/ourbigbook-media/master/feature/x/hilbert-space-arrow.png
  4. Infinitely deep tables of contents:
    Figure 6.
    Dynamic article tree with infinitely deep table of contents
    .
    Descendant pages can also show up as toplevel e.g.: ourbigbook.com/cirosantilli/chordate-subclade
All our software is open source and hosted at: github.com/ourbigbook/ourbigbook
Further documentation can be found at: docs.ourbigbook.com
Feel free to reach our to us for any help or suggestions: docs.ourbigbook.com/#contact