Viewing profile — amyres

Exactly. The actual solution to the puzzle in question has a GCD not divisible by 9.

One more nitpick on the upper bound of the GCD: since we know that 0 is going to be in every column, one of the row numbers must start with a 0 and will be an 8-digit number (0 in …

Since we're over-engineering here, one more optimization is to skip all potential GCDs that are divisible by 2 or 5. Suppose the GCD was divisible by 2, then all rows would be even…

There's a fallacy going on with this kind of anecdote (observing both increases in housing and increases in pricing concurrently), namely not being able to observe the counterfactu…

There's a good book from 1990 with lots of detail, history, and examples of AARON and Harold Cohen's work: Aaron's Code by Pamela McCorduck. Recommended reading for anyone into gen…

Cool thanks! I'm amazed at how much can be done in PostGIS (if my SQL queries are good enough...)

Using the built-in PostGIS topology tools? Or something more custom? I'm curious as I just started digging into and using PostGIS for a land parcel use case. I've wondered about th…