Notes on things worth noticing
biscuits in tea
Math · Code · Physics · Music · Poetry · Chai · Patterns
A commonplace book for equations, programs, melodies, fragments of poetry — and the small ordinary moments that become extraordinary when we actually notice them.
A small invitation
Before the next article, perhaps make some chai. Keep one biscuit nearby. Read slowly.
Featured essay
Biscuits in Tea
A small manifesto for attention, curiosity, chai and the dangerous few seconds between a crisp biscuit and surrender.
Explore by constellation
Recent notes
View all →Applicatives in Pictures
From fmap to <*>: combining independent values that live inside a shared computational context.
Basis: Choosing Coordinates for a World
A basis is not the vector space; it is the coordinate language we choose to describe it.
Biscuits in Tea
A small manifesto for attention, curiosity, chai and the dangerous few seconds between a crisp biscuit and surrender.
Cosine Similarity: When Angle Becomes Meaning
Normalize the dot product and vector angle becomes a practical measure of similarity.
Covariance: How Variables Move Together
From scatter clouds to covariance ellipses, principal directions and positive semidefinite matrices.
Eigenvectors: Directions That Refuse to Turn
Some directions survive a linear transformation without changing direction. Those are eigenvectors.