alt.hn

2/8/2026 at 2:03:27 AM

The other Markov's inequality

https://www.ethanepperly.com/index.php/2026/01/16/the-other-markovs-inequality/

by tzury

2/12/2026 at 6:53:27 AM

It’s been a while since I’ve done my Applied Computational Math Sciences degree, but I still appreciate seeing mathematically oriented posts like this on HN!

by camkego

2/12/2026 at 1:39:12 PM

This made a noticeable woosh sound as it went right over my head. How the hell does a polynomial "wiggle"?

But the Chebyshev polynomials, especially in their recursive definition, are a stroke of genius.

by zombot

2/12/2026 at 2:20:10 PM

> How the hell does a polynomial "wiggle"?

I believe they’re defining “wiggle” as just the slope/rate of change/derivative

by bumby

2/12/2026 at 3:18:17 PM

Exactly.

Wiggling feels more like a second-derivative thing to me but that's discussed too - Chebyshev polynomials max out the second derivative as well as the first.

by madcaptenor