danielz.fyi

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Showing 14 of 14 entries
Akari
A fun puzzle genre + some of my solutions and strategies.
Bernoulli/Poisson processes
Some intuition behind the formulas.
Convexity
How to go about proving certain functions are convex.
The exponential
A combinatorial look at the exponential Taylor series.
Hall's marriage theorem
Two proofs of Hall's marriage theorem, and problems.
HOC Retreat 2026
A recap of my 2026 all-HOC retreat.
Orders
Common strategies to rearrange elements into an "optimal order."
P vs NP
An introduction to P vs NP, NP-hard, and NP-complete + some illustrative proofs.
Segment tree
A bit on iterative segment trees.
The Sprague-Grundy theorem
How can we define a group on the set of impartial games?
Survivor bias
Some thoughts on survivor bias.
Transposes
Why are the determinants of a matrix and its transpose equal?
Voting
An introduction to social choice theory and metric voting.
Watchlist
Movie + TV reviews.

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