Top all-time · #24619
Federico Magnani
Personal blog · fedemagnani.github.iomathprogramming
Federico Magnani's personal blog at fedemagnani.github.io covers math and programming. Since 2026, 3 different Hacker News readers have linked it 4 times, most often “Your Function's Doppelgänger (Fenchel Conjugate)”. It is still writing: the last post was on 2026-05-24, and you can follow it by feed.
Too few sampled comments (1) to say how often HN recommends it.?
Why HN links it
Math posts on optimisation topics, such as Hessian eigenvalues and convex conjugates. One commenter says an article on the Hessian clarified why its min and max eigenvalues matter.
Summarised by Claude from a sample of 1 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
Rust, Computational Mathematics, Finance and other stuff. God bless pane & olio.
Most-linked posts?
- Your Function's Doppelgänger (Fenchel Conjugate)2 people · 2 mentions · first linked 2026-05-24
What Hacker News says?
Thank you for writing this article! It really helped me clear up my understanding of why you care about min and max eigenvalues of a Hessian matrix, something I've been confused about for some time. I have https://fedemagnani.github.io/math/2025/07/04/fenchel.html queued up to read next (convex conjugates being another topic that confuse the hell out of me).
Comment linking /math/2025/07/04/fenchel.html
on “The Quadratic Sandwich”Submitted Your Function's Doppelgänger (Fenchel Conjugate) as a story · 2 points
HN discussionSubmitted Fork your conversations and rebase your prompts as a story · 1 points
HN discussionSubmitted The Quadratic Sandwich as a story · 1 points
HN discussion