Friedrich’s “Fred” Notes

Friedrich "Fred" Clausen

I am a build and infra automation engineer working to become a better all-round developer. This blog is a record of my travels in both the development, infrastructure, and computer science mathematics space. The info on this blog may be correct or it may not; happy to get feedback either way.

Another repertoire method example from Concrete Mathematics

This is my third post on the repertoire method. This method seems quite magical (or perhaps that means I don’t fully understand it 😅). In this case I am refe...

Sums of sums visually and as nested “for” loops

In Concrete Mathematics (Graham, Patashnik, Knuth) I am working my way through page 36 about sums of sums. Specifically the “rocky road” (yum) method for sw...

Terraform: Solving the double slash mystery with Terragrunt

The solution I found to my particular case of “Error: Unreadable module directory” when using Terragrunt.

Concrete Mathematics: Quick geometric series with Towers of Hanoi Clarification

This concerns the paragraph just before equation 2.9. I will quote it here

Concrete Mathematics: Repertoire Method Section 2.2 - The Sequel

As with most of my posts on Concrete Mathematics this is a more verbose outline of the repertoire method in section 2.2. It explains how to find the closed f...