amyres

4 ms·

1. 1.▲
   by amyres 2y ago

   Exactly. The actual solution to the puzzle in question has a GCD not divisible by 9.
2. 2.▲
   by amyres 2y ago

   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 the first cell). The GCD can't be larger than the small
3. 3.▲
   by amyres 2y ago

   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. Since the last digit of an even integer is in {0,2,4,
4. 4.▲
   by amyres 3y ago

   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 counterfactual of NOT adding housing (but keeping all other socio-e
5. 5.▲
   by amyres 4y ago

   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 generative art, or more generally the intersecti
6. 6.▲
   by amyres 4y ago

   Cool thanks! I'm amazed at how much can be done in PostGIS (if my SQL queries are good enough...)
7. 7.▲
   by amyres 4y ago

   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 the graph structure of parcels adjacent to others, r