Total derivative Updated 2025-07-16
The total derivative of a function assigns for every point of the domain a linear map with same domain, which is the best linear approximation to the function value around this point, i.e. the tangent plane.
E.g. in 1D:
and in 2D:
IBM System/360 Updated 2025-07-16
This is a family of computers. It was a big success. It appears that this was a big unification project of previous architectures. And it also gave software portability guarantees with future systems, since writing software was starting to become as expensive as the hardware itself.
Myoglobin Updated 2025-07-16
From Wikipedia:
In humans, myoglobin is only found in the bloodstream after muscle injury.
Topology Updated 2025-07-16
Just by havin the notion of neighbourhood, concepts such as limit and continuity can be defined without the need to specify a precise numerical value to the distance between two points with a metric.
As an example. consider the orthogonal group, which is also naturally a topological space. That group does not usually have a notion of distance defined for it by default. However, we can still talk about certain properties of it, e.g. that the orthogonal group is compact, and that the orthogonal group has two connected components.
Tree traversal Updated 2025-07-16
In principle one could talk about tree traversal of unordered trees as a number of possible traversals without a fixed order. But we won't consider that under this section, only deterministic ordered tree traversals.
The Wayback Machine has an endpoint to query cralwed pages called the CDX server. It is documented at: github.com/internetarchive/wayback/blob/master/wayback-cdx-server/README.md.
This allows to filter down 10 thousands of possible domains in a few hours. But 100s of thousands would be too much. This is because you have to query exactly one URL at a time, and they possibly rate limit IPs. But no IP blacklisting so far after several hours, so it's not that bad.
Once you have a heuristic to narrow down some domains, you can use this helper: ../cia-2010-covert-communication-websites/cdx.sh to drill them down from 10s of thousands down to hundreds or thousands.
We then post process the results of cdx.sh with ../cia-2010-covert-communication-websites/cdx-post.sh to drill them down from from thousands to dozens, and manually inspect everything.
From then on, you can just manually inspect for hist on your browser.
CIDARLAB/cello Updated 2025-07-16
The input is in Verilog! Overkill?
Then it essentially maps to a standard cell library of biological primitives!

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