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John D. Cook
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Latest posts
Last updated 4 days ago
Rolling n-sided dice to get at least n
6 days ago
Say you have a common 6-sided die and need to roll it...
Weak derivatives
6 days ago
There are numerous memes floating around with the words “Being weak is...
Fourier transform of a Fourier series
8 days ago
The previous post showed how we can take the Fourier transform of...
Fourier transform of a flat line
8 days ago
Suppose you have a constant function f(x) = c. What is the...
Obscuring P2P nodes with Dandelion
8 days ago
The weakest link in the privacy of cryptocurrency transactions is often outside...
What is a Pedersen commitment?
9 days ago
I’m taking a break from my series on celestial navigation. The previous...
The Navigational Triangle
11 days ago
The previous post introduced the idea of finding your location by sighting...
Line of position (LOP)
12 days ago
The previous post touched on how Lewis and Clark recorded celestial observations...
Lewis & Clark geolocation
15 days ago
I read Undaunted Courage, Stephen Ambrose’s account of the Lewis and Clark...