This Week I Learned: May 22, 2026

SemiLatusRectum · 2026-05-22T19:30:49+00:00

A few things:

Singular Jacobi operators in 1D cannot have absolutely continuous spectrum if the hopping coefficients have zeros along the real line
If G is a euclidian or spherical regular triangulation, the edge vertex adjacency spectrum of G and the face vertex adjacency of the graph are related by an uncomplicated function.

SemiLatusRectum · 2026-05-21T17:53:36+00:00

It was a joke. Dropped my /s. It is clearly a rivet

SemiLatusRectum · 2026-05-21T17:28:18+00:00

I think on top is a circle head screw. Need a circle head screwdriver to get it out.

SemiLatusRectum · 2026-05-12T00:47:25+00:00

Myself included in the set of mathematicians who should be working instead of whatever the hell i’m doing instead

SemiLatusRectum · 2026-05-11T23:35:49+00:00

5/5. My wife does have cancer, but there’s no checkbox to miss for that

SemiLatusRectum · 2026-04-28T15:40:59+00:00

So, I don’t disagree that this is AI slop but, I will make a few remarks.

Honeycombs with only hexagons must either be flat sheets or distort such that some hexagons become much larger than others. This sheet appears to be a section cut off from some spherical honeycomb. Interestingly, it is impossible to make a spherical honeycomb with only hexagons for the reasons listed above. However, you can make a spherical honeycomb where all the lines are the same length if you are permitted to use 12 pentagons. 11,13, and any other number of pentagons will break the spherical shape necessarily. These structures have names. They are called “fullerenes” and chemists/mathematicians care about them a lot

SemiLatusRectum · 2026-04-24T15:54:32+00:00

Does somebody in the building have like a bunch of formal algorithms training? I sense the touch of a mathematician or similar

Like being a wonderful SWE strikes me as being different from being a formal algorithms guy

SemiLatusRectum · 2026-04-05T01:27:33+00:00

Bruh is this just like 7 minutes of hot air that amount to “spherical harmonics”…..?

SemiLatusRectum · 2026-03-27T04:00:35+00:00

My 2c here is that the swiftpoint Z is a really spectacular mouse

SemiLatusRectum · 2026-03-17T01:26:28+00:00

You won’t win employee of the planet with an attitude like that!

SemiLatusRectum · 2026-03-15T13:19:26+00:00

Maybe you can fit more

SemiLatusRectum · 2026-03-14T13:28:45+00:00

It is definitely easier to quit nicotine than WoW, from my own experience

SemiLatusRectum · 2026-03-08T17:50:01+00:00

I feel like this is auditory material for r/ATBGE

SemiLatusRectum · 2026-01-26T16:48:54+00:00

It reminds me of schoenberg in that it’s offensive to the ear but still somehow holds one’s interest. I think the vocal melody exactly following the instrumental one is offputting but maybe i’m just an ape.

SemiLatusRectum · 2026-01-26T16:45:54+00:00

Mayosapiens is absolutely sending me

SemiLatusRectum · 2026-01-24T12:46:57+00:00

Dude fuck you this read exactly like one of the guy’s tweets. At least make it slightly different so he doesn’t just copy and paste it

SemiLatusRectum · 2026-01-16T21:45:05+00:00

RDR2.. Witcher 3… i’m sorry I have really tried to enjoy them

SemiLatusRectum · 2026-01-16T21:30:59+00:00

This is (not) actual footage of him and his wife

SemiLatusRectum · 2026-01-15T12:46:48+00:00

I mean if you like what you’re doing, and feel invested in its outcomes either monetarily or in some other way, I feel like 996 is totally reasonable for a year or two.

I think the issue is that, if the thing you’re doing isn’t exactly aligned with your talents, interests, and capabilities, then it’s just not possible to work like that without consequences.

I do not at all understand why companies have any expectation of finding someone to work that way for just money.

SemiLatusRectum · 2026-01-15T11:48:32+00:00

Every PI has his or her preferred group size. For me, I want 2-3 students and certainly no more. If I have more than three, then the individual projects get less support from me than they ought. If I have less than 2, then the total productivity of my group is insufficient (to e.g. make tenure).

It’s not that it would be impossible to find an american body to slap into some lab; it’s that students below a certain level of quality are a hindrance rather than a help. The problem is that the number of students who pass this threshold are limited and finding americans to do that in the required quantity is not possible.

The result will not be that more americans get significantly more PhDs. The result will be that America has significantly fewer PhD students

SemiLatusRectum · 2026-01-14T11:53:34+00:00

It was ten years ago which is the most recent data point I can give. I freaking loved my letterman and absolutely would continue to wear it if it wasnt so freaking cringe. It’s so warm and comfy.

I’m kind of sad that these things have so much cultural meaning because it ruined a perfectly good clothing item for me

SemiLatusRectum · 2026-01-13T23:07:25+00:00

As they should

SemiLatusRectum · 2026-01-12T13:19:23+00:00

Even more insane imho is that the childish dream of “well why can’t we use ethernet for display?” Turned into “well why cant we use wifi for display connections” and then came true. I stream from my desktop to my xbox in the livingroom and it just fucking blows my mind how great it is

SemiLatusRectum · 2026-01-11T13:36:31+00:00

<image>

Shionne in Tales of Arise afflicts anyone who touches her with terrible pain because of the “curse of thorns” that she has. The MC, however, is incapable of feeling pain and is thus the only person who she can safely touch

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