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Blog · Seungheon Doh
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  • August 16, 2026
    Interactive Stochastic Differential Equations

    Random walks and Brownian motion, stochastic processes and the Markov property, Itô calculus and SDEs, and finally the Fokker–Planck equation and the probability flow ODE that underpins diffusion models.

  • August 16, 2026
    Interactive Differential Equations

    ODEs and their numerical solvers — direction fields, initial value problems, phase portraits, Euler and Runge–Kutta, and numerical stability — then PDEs: the transport, continuity and diffusion equations.

  • August 8, 2026
    Interactive Calculus

    Functions, limits, derivatives and the chain rule, Taylor expansion and integrals, then partial derivatives, the gradient, Jacobian, Hessian, vector fields, divergence and the Laplacian.

  • July 30, 2026
    Interactive Information Theory

    Self-information, entropy and coding length, cross-entropy and KL divergence, mutual information, and the losses built on them — cross-entropy, perplexity, the ELBO, and InfoNCE.

  • July 23, 2026
    Interactive Probability

    Random variables, joint and conditional distributions, expectation, the distributions machine learning actually uses, and the road from likelihood to NLL, Bayes' rule, and MAP.

  • July 14, 2026
    Interactive Linear Algebra

    Vectors, inner products, eigenvalues, the four fundamental subspaces, change of basis, and PyTorch einsum/permute/view/reshape.

© 2026 Seungheon Doh

seungheondoh.github.io