In June of this year, I read Paul Graham’s essay on names. The author (whom you may know from his book On Lisp) begins with the following advice:

If you have a US startup called X and you don’t have, you should probably change your name.

I’d relax the consequent of this advice to:

If you have a US startup called X and you don’t have, you should probably change this situation.

Changing your name from X to something else is one possibility, but acquiring (if possible) is often a better solution. Changing a name is often not a zero-cost operation — the Royal Mail found out the hard way in the early 2000s — so this option should not be taken lightly.

When I’d checked in previous years, was unavailable. When I checked this year, the previous owners must have allowed their registration to elapse; it had been swiftly snapped up by a ‘domainer’: a market-maker which buys elapsed domains and offers them at a substantially higher price. A few moments of cost-benefit analysis were sufficient to conclude that buying the domain was a good idea.

Anyway, today I intended to write a post on Hadamard matrices, only to find that the WordPress editor had undergone a considerable change which (for me at least) renders it less usable than before. The ‘classic editor’ is still available as a plugin, but this plugin is only free for self-hosted websites. This gave me the impetus to switch! As such:

  • Complex Projective 4-Space is now self-hosted at instead of, with the latter redirecting to the former. This applies ‘recursively’ to the whole site, so no existing links to individual posts are broken.
  • Catagolue is now primarily located at, which has the advantage (over the default Google domain) of being accessible from within mainland China. The other mirrors still continue to work.

On the subject of Catagolue, the quantity of random soups being searched has increased very rapidly as a result of GPU support being added to the search program. At the time of writing, there have been 40 × 10^12 soups searched using CPU-only instances (from 2015 to present), compared with 104 × 10^12 soups searched using GPU-powered instances (from 2019 to present).

This calendar year has seen the emergence of the first natural period-7 objects: three instances of the loafer and (yesterday) a burloaferimeter variant.

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