# grungegun's recent activity

1. ## Comment on Tildes should support Latex in ~tildes

grungegun
Thanks, I did not notice that particular post at first. It is the fifth result currently in a google search.

Thanks, I did not notice that particular post at first. It is the fifth result currently in a google search.

1 vote
2. ## Comment on What is 0 to the power of 0? in ~science

grungegun
You can extend it by noting that fa(x)=ax is continuous. Do do that, just note that fa(x+\epsilon) = fa(x)fa(\epsilon). Them, as \epsilon->0 fa(\epsilon)->0 taking \epsilon to be in the rationals....

You can extend it by noting that fa(x)=ax is continuous. Do do that, just note that fa(x+\epsilon) = fa(x)fa(\epsilon). Them, as \epsilon->0 fa(\epsilon)->0 taking \epsilon to be in the rationals. This implies the extension to the reals is continuous, which implies that it is 0 throughout.

4. ## Comment on Is there a known image norm suitable for textured images? in ~comp

grungegun
I'm not sure about the second source, but the first one looks pretty interesting, though if I read correctly, their primary innovation is in choosing an activation function which ought to be...

I'm not sure about the second source, but the first one looks pretty interesting, though if I read correctly, their primary innovation is in choosing an activation function which ought to be really good at 3D stuff. I've bookmarked it to read in depth, but they have some really good quality extrapolations. My one complaint is that the cat pictures are too small to tell how well the fur is preserved.

It looks like the SIREN process relies on overfitting models to test data to generate more plausible data? It's not an approach I had considered, since I was thinking about using an RNN, similar to GPT (though I know they use a mutilated version of an RNN), but I'll definitely look into it.

Your comments on different domains is true, but as I was walking today along a gravel road, I was thinking that one part of the gravel road looked similar to another in texture. Maybe what you say about material parameters could be used. Give a neural network control over generating material parameters for extrapolation instead of pixel colors.

5. ## Comment on Tildes should support Latex in ~tildes

grungegun
I didn't see it either. I thought the server-side rendering novel, but it looks like someone's already tested it.

I didn't see it either. I thought the server-side rendering novel, but it looks like someone's already tested it.

6. ## Comment on Tildes should support Latex in ~tildes

grungegun
Thanks for finding that. I read the katex specs only, and didn't notice that there was more to the discussion. The quote appears to agree with what I found looking through github.

Thanks for finding that. I read the katex specs only, and didn't notice that there was more to the discussion. The quote appears to agree with what I found looking through github.

7. ## Comment on Bird brains are far more human-like than once thought in ~science

grungegun
(edited )
A link to the Hacker News discussion for anyone interested in seeing more discussion related to this. Note that the researchers do not measure anything that suggests that crows have subjective...

A link to the Hacker News discussion for anyone interested in seeing more discussion related to this.

Note that the researchers do not measure anything that suggests that crows have subjective experience like the article claims. However, some similarities in brain structure between birds and mammals were found.

Also, it was shown that crows have varied response to expectation of results. To me, this is the expected result, since almost all animals can be conditioned. The article claims that making the stimulus at the edge of the bird's perceptual boundary implies some sort of sensory experience. However, in the quote from the researcher, common sense is cited as the motivating factor. Chalmers (in my opinion) demonstrated conclusively that consciousness cannot be measured.

However, learning more about bird brain structure is interesting. And verifying our preconceptions regarding bird behavior is an important part of science, so definitely and interesting article, even if I disagree with the author's somewhat tenuous extrapolation from the contents of the reviewed papers.

8. ## Comment on Noita - 1.0 release date trailer (October 15) in ~games

grungegun
(edited )
I don't consider this a spoiler - more of a necessary enhancement to the game, go left on the second level, there're better wands there. It helps alleviate the rng a bit at least. It's strangely...

I don't consider this a spoiler - more of a necessary enhancement to the game, go left on the second level, there're better wands there. It helps alleviate the rng a bit at least.

It's strangely curious how uneven Noita is. Enemy health is just scaled up in the game, which is a poor way of increasing difficulty. The devs added alchemy into the game, it's just so obscure that I've only seen a real chemical reaction twice. Wand design is fun, but they don't enable editing wands everywhere because player's played wrong. Enemy AI feels simplistic. Instead of increasing the world's interactiveness, there was the feast update. Yet, the physics is fantastic, the music is good. The visuals look excellent, from a technical perspective this game is amazing.

I think the devs have a very strange preconception about how to play their game, and I don't understand their direction. These guys are really good at the techy aspect of game design (their resumes are pretty impressive), but they need to pull someone who's good at fun, like Derek Yu.

9. ## Comment on Is there a known image norm suitable for textured images? in ~comp

grungegun
I'm trying to tween images in video. Basically, fill in missing details. This is a well-known point of interest, but if you look at the paper in the link, they use the l2 norm that I was talking...

I'm trying to tween images in video. Basically, fill in missing details. This is a well-known point of interest, but if you look at the paper in the link, they use the l2 norm that I was talking about. The problem with this norm is that it doesn't describe a natural fit for what the human eye sees as similar.

Basically, it's saying that the human eye picks things out pixel by pixel, which we know it doesn't. If you look at a picture, with a dog with matted fur, when asked to recreate that picture, if you're a good artist, you'll make a good fur-like sketch of the dog, but every floof and curl won't match up exactly, unless you're a savant. However, any reasonable person would say - that's pretty close, because we think about things in terms of shape, color, and texture. If you were graded by the l2 norm, it would give you a poor score, despite it looking good to the human eye.

Wavelet transforms allow frequency based analysis, but I'm not aware of a method of measuring image distance which is a natural fit to what we actually see. Defaulting to $l_2$ seems like setting myself up for failure, either as a result of over-fitting, or lack of data. I have a couple terabytes prepped, but we'll see.

10. ## Comment on Tildes should support Latex in ~tildes

grungegun
Hm, Deimos's server side rendering suggestion is interesting. I think it gives a method for lightweight support. Rather than rendering to an image, as recommended, apply the js in mathtex(katek)...

Hm, Deimos's server side rendering suggestion is interesting.

I think it gives a method for lightweight support. Rather than rendering to an image, as recommended, apply the js in mathtex(katek) directly on the server side, then just send the generated css over. It appears to support this directly. The font problem is serious, but the fonts are hosted separate from each other, so a $150\,kb$ font download impact could be managed by restricting overly specialized symbol use.

Optionally, it could be a toggle, by default off that you enable to determine whether you want to enable the rendering of latex snippets.

11. ## Comment on Tildes should support Latex in ~tildes

grungegun
There's my post asking about norms This is partly a chicken/egg problem. I don't include mathematical notation because it's hard to format. However, it would make my post clearer, for instance, I...

There's my post asking about norms This is partly a chicken/egg problem. I don't include mathematical notation because it's hard to format. However, it would make my post clearer, for instance, I could give definitions for some of the terms I use, just in case someone isn't familiar with them.

It's mostly a question of whether users should be able to discuss math with each other or is tildes aiming to have 'that's cool' discussions about math posts. Most science discussion forums aren't very scientific in that they can't encourage the experimental method, which is a shame. However, math is unique in that you can do it on the fly, in discussion, anywhere, which means that any discussion involving mathematics could turn into a discovery. I'm in favor of encouraging this, as opposed to a math from the sidelines approach.

12. ## Comment on Tildes should support Latex in ~tildes

grungegun
I used this. I believe the idea is the same, but, to my knowledge, Tildes doesn't currently support all the markdowns present in what's being generated.

I used this. I believe the idea is the same, but, to my knowledge, Tildes doesn't currently support all the markdowns present in what's being generated.

13. ## Comment on Tildes should support Latex in ~tildes

grungegun
(edited )
I imagine that there would be two facets: the first would be string cleaning, which wouldn't be too difficult. The second is the addition of a js script file. It would technically introduce images...

I imagine that there would be two facets: the first would be string cleaning, which wouldn't be too difficult. The second is the addition of a js script file. It would technically introduce images into tildes, though I think it's worth that cost.

As far as being technical, latex isn't particularly. The mathematical formatting system is fairly standard. Should we implement it now? Maybe not immediately, but I think it would help conversations about math/programming/science as far as clarity.

As far as pastebin, I don't believe that works:
∫px=0e−x2dx symbols are transferred, but to rewrite if properly using the sup markdown, would be fairly difficult: repeated exponentiationa appears to work, but subscripts are shifted over. So I could write the equation as ∫px=0e−x2dx
but for anything more complex than that, you start to run into trouble. I image a fair amount of the users here have some familiarity with LaTeX, and I like to think of math as a universal language, so I don't think there would be any negative impact.

14. # Tildes should support Latex

Tildes should support Latex using MathJax, or something similar. Having a standard implementation would also act as an easy way to use advanced formatting, while extensions beyond the sub and sup...

Tildes should support Latex using MathJax, or something similar. Having a standard implementation would also act as an easy way to use advanced formatting, while extensions beyond the sub and sup tags are being made. It would greatly increase the ease of using ~math (actually ~science). Though I could be wrong, it doesn't look like $$\LaTeX$$, $$x^2$$ $\int_{x=0}^p e^{-x^2}dx$ is rendering.

Edit: Katex (not my MathJax recommendation) was a good suggestion, using a partial font download and server side html/css generation.

Edit: Also, to be clear, this is not a must-have-now feature (though that would be nice), but I would like to see support for this in the future, as latex is almost universal in the mathematical sciences.

15. # Is there a known image norm suitable for textured images?

Suppose I am trying to iteratively produce a completed image from some subset using a combination of convolutional/DNN methods. What Image norm is best? The natural (for me) norm to ascribe to an...

Suppose I am trying to iteratively produce a completed image from some subset using a combination of convolutional/DNN methods. What Image norm is best?

The natural (for me) norm to ascribe to an image is to take the bitmap as a vector with L2. If the input image is anime or something else, the uniform coloring makes this very likely to be a good fit in a low dimension - that is: no overfitting.

However: pictures of fur. Given a small square, the AI, set to extrapolate more fur from that single image, should be expected to get that stuff right next to the given subimage right, but further away, i want it to get the texture right, not the exact representation. So, if the AI shifts the fur far away from the image left by just the right amount, it could get an incredibly poor score.

If I were to use the naive L2 norm directly, I would be guaranteed to overfit, and you can see this with some of the demo algorithms for image generation around the web. Now, the answer to this is probably to use a fourier or a wavelet transform and then take the LN norm over the transformed space instead (correct me if I'm wrong.)

However, we get to the most complex class: images with different textures in them. In this case, I have a problem. Wavelet-type transforms don't behave well with discrete boundaries, while pixel-by-pixel methods don't do well with the textured parts of images. Is there a good method of determining image similarity for these cases?

More philosophically, what is the mathematical notion of similarity that our eye picks out? Any pointers or suggestions are appreciated. This is the last of two issues I have with a design I built for a Sparse NN.

16. ## Comment on Thoughts on feeling like you're posting too many links when there is not enough content in ~tildes

grungegun
I recognize about half of the links on tildes from HackerNews and reddit, so I believe it is hard to argue that you'd lower the bar substantially if it's an article you've found yourself (this...

I recognize about half of the links on tildes from HackerNews and reddit, so I believe it is hard to argue that you'd lower the bar substantially if it's an article you've found yourself (this also demonstrates that I spend too much time on those other sites). I dislike most link posts primarily because content aggregate sites exist already, though there have been a couple of more obscure articles which I've enjoyed reading recently, that wouldn't have surfaced elsewhere.

17. ## Comment on ∞ Inbox Vs. Inbox Zero in ~tech

grungegun
I am inbox infinite, I use search to find important emails, though I went over the 1GB threshold recently. I achieve inbox zero every once and a while by just deleting everything and saving...

I am inbox infinite, I use search to find important emails, though I went over the 1GB threshold recently.
I achieve inbox zero every once and a while by just deleting everything and saving important stuff in a txt file. I have to say, it's a pleasant existence: I use my free time to walk to the other side of the room and grab a cookie.

1 vote
18. ## Comment on An open invitation to discuss r/AskBibleScholars extending its reach to Tildes in ~tildes

grungegun
I'd like it if you just started the community now, and figured out the import in the meantime. The transfer could be gradual until that final push when @Deimos figures everything out. I wouldn't...

I'd like it if you just started the community now, and figured out the import in the meantime.

The transfer could be gradual until that final push when @Deimos figures everything out. I wouldn't worry about lack of content, I am very interested in having my questions answered, and if necessary, I know a number of Biblical scholars myself who could join.