I think it might be _unethical_ to not spread the joy of playing Doom for the first time? Though, I’m not entirely sure there’s been enough research done about the effects of violent video games in rat gamer populations.
We've been putting rats in skinner boxes for a lot longer than we've been subjecting human gamers to them. I'd be more worried about the health effects of all that sugar water.
Giving them slightly acidic water off-rig and normal water while playing is another option - not the best either. I opted for sugar in the end, because they didn't spend much time on the setup; but this should be reconsidered if they on-rig for hours daily.
It's more like locking humans up in the matrix. Note lines like "preventing it from leaving the apparatus" in the build guide. Would an ordinary gamer be restricted from exiting such a contraption?
I was very happy to see this. I’m fairly against live animal testing, but giving rats the joy of playing Doom??? I think I _may_ have to be OK with this.
I do not think I appreciated the formula until I had been exposed to the exponential map in its generalized forms: The so-called 'matrix exponential' and the exponential map of Lie algebra. They place Euler's humble formula into a grander and rather beautiful setting.
Now, I like to think of exponentiation as a kind of integral over infinitesimal generators; and $i$ just happens to be a generator for rotation about a circle in the plane (aka $\mathrm{U}(1)$ aka $x \mapsto e^{it}x$).
Dismissing the FreeBSD community as contrarians feels uncharitable. I can think of at least a few other contributing factors for the increase in popularity of late:
1) Linux's popularity has enlarged the pool of users interested in Unix-like operating systems. Some proportion of users familiar with Unix genuinely like FreeBSD and the unique features it offers.
2) The rise of docker and the implosion of VMWare has driven an increase of interest in FreeBSD Jails and the Bhyve hypervisor.
3) Running a homelab is a popular hobby. ZFS is popular for RAID, and pf is popular for networking.
This distinction is only made by a small number of mostly constructivists.
It is not common usage, and most working mathematicians will have no idea what you're talking about.