In a previous article I described how I
discovered that the utility I needed was already available in my
Another episode in this series: I save screen and monitor
configurations in files under
Yesterday I wanted a home setup where both monitors had the same
resolution and the same display. I opened
Except that file already existed, and guess what was in it?
(I finally figured out this one from Friday. It was entirely my fault. Do I feel bad for making the mistake in the first place? No, I feel awesomely clever for successfully cleaning up the complex mess I made.)
Here's an alternative mnemonic: a bracelet symmetry is modulo the dihedral group !!D_n!!, and “bracelet” begins with a “D”, whereas a necklace symmetry is modulo the cyclic group !!Z_n!!, and “necklace” begins with a “Z”.