Alphabeta Math

Discrete diffusion chains and DDPM objectives

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1 · Prerequisites
Abstract Algebra
Bayesian Computational Statistics
Combinatorics
Coxeter Groups
Functional Analysis
Linear Algebra
Mathematical Statistics
Measure Theory
Number Theory
Probability
Real Analysis
Set Theory
Statistical Models and Experiments
Topology
2 · Logical flowchart

3 · Items

Definition

Finite Gaussian forward chain and Gaussian reverse model

Lemma

Reverse KL between isotropic Gaussian laws

Theorem

Closed Gaussian forward marginal and conditioned posterior

Theorem

DDPM variational objective and weighted noise-prediction terms

Algorithm

Epsilon-prediction diffusion objective estimator

Lemma

Expected output of the diffusion objective estimator

Sources