Formula Vault

Quick-reference formulas

The key formulas and definitions for each subject, in one place — for the day before the exam, not for working through a full lesson.

Distributions, Bayes' theorem, hypothesis testing.

Vector spaces, eigenvalues, matrix decompositions.

Single-variable calculus and optimization.

Python, core data structures, search, sort and graphs.

ER/relational model, SQL, warehousing.

Supervised and unsupervised learning.

Search, logic and reasoning under uncertainty.

Numerical ability, logical reasoning and verbal ability.