joe__f

15 ms·

211.
by joe__f 5y ago
I was expecting the post to mention how nuclear energy fits into this modelling somewhere, and I was surprised when it didn't. It looked to me that it could be at least a partial solution to most of the points raised.
212.
by joe__f 5y ago
No, I haven't "constructed something, labelled it the natural numbers and derived axioms from its properties". For me, the negative numbers are an aspect of nature and I came across them by observation (well, other people did
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by joe__f 5y ago
I think something like Wikipedia's current events portal [0] is a great way to take in news. I think it tries to give a sort of impartial global overview rather than focusing on a subset of stories, ideologies etc., with a minimal amou
214.
by joe__f 5y ago
No, I'm not assuming any axioms. I'm describing the process of observing properties of nature and then finding a formalised description of those properties. The negative numbers are what we call the system of numbers which arose i
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by joe__f 5y ago
So I take it that you're happy that the natural numbers exist. Staring from there, this is where the ring axioms came from; Different people sat down over the last millennium or so and realised that the natural numbers could only expre
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by joe__f 5y ago
I would argue that they need to by definition, and that if they don't then they are no longer the negative numbers
217.
by joe__f 5y ago
Real numbers have a unique canonical ordering (up to isomorphism). So given x and y real, it is always true that either x < y, x = y or x > y. Complex numbers don't have a unique ordering. So for for example take 1+i and 5-2i. Wh
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by joe__f 5y ago
Based on "The conclusion that (-2)x(-3)=6 is obvious only in the sense that our choice of axioms for negative numbers is obvious—it just seems* like the right way to define negative numbers"*, I think you're arguing that th
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by joe__f 5y ago
If you give vectors in the plane the same multiplication rule as complex numbers, then I think it's fair to say that they are ontologically equivalent. If you take your vectors and equip them with a different multiplication rule they w
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by joe__f 5y ago
I have a doctorate in mathematics, I didn't get those vibes when I read this title
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by joe__f 5y ago
I absolutely agree with this. There's also a quote in the article from one of the scientists saying they don't like calling it a crisis
222.
by joe__f 5y ago
General relativity was not produced in isolation, there were a number of other big names in mathematics and physics at the time trying to find a relativistic theory of gravitation. Einstein will have been discussing with the other physicist
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by joe__f 5y ago
Jewishness encompasses both religion and ethnicity [1] [1] https://en.m.wikipedia.org/wiki/Jews
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by joe__f 5y ago
Is there a tool to decompile gameboy roms into C? Could be an interesting way to learn a bit about how the system works, as well as learn a bit of ASM
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by joe__f 5y ago
It may be possible to use gravitational waves to transmit signals, although gravity is hugely more challenging to manipulate than electromagnetism because it's purely attractive and interacts much less strongly with matter, making this
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by joe__f 5y ago
I just put a glass screen protector on my phone and a thin plastic case that goes round the back. I drop it reasonably regularly and I've never had a broken screen, it's a Samsung A series. I guess it costs about £10 for the case
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by joe__f 5y ago
Yes, you've made the same argument as the article, estimating the impact of producing the toilet paper but not that of producing the bidet. What is the impact of acquiring (mining?) the ceramic and metal parts, and then manufacturing t
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by joe__f 5y ago
The article discusses the environmental impact of producing and dustributing the toilet paper, but not the impact of manufacturing, installing and upkeeping the bidets. By my totally uninformed guesstimate, it would take a lot of toilet pap
229.
by joe__f 5y ago
Yes, gravitational wave are governed by the wave equation. A standard way to treat them is as a small perturbation around a known spacetime geometry. Then the metric would be $g = g_0 + \epsilon h$, where $g_0$ is the background, $\epsilon
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by joe__f 5y ago
Add which terms to what without violating which constraints?
231.
by joe__f 5y ago
I think the thing about social skills is that a lot of it is about un learning, rather than learning. Let's say you're chatting with someone you don't know, one to one. You feel like you don't know what to say, so you t
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by joe__f 5y ago
That is really cool! It looks like the gameboy board is used only for IO, and everything else goes on in the Pi in the cartridge? I think you'd seriously miss having four buttons on the face in the console though, I don't know if
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by joe__f 5y ago
This looks great. I understood that DuckDuckGo was a search engine, is the idea that they're planning to release an Android app with this functionality which blocks tracking from other apps?
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by joe__f 5y ago
What was the goal in the gaming example? You could have a goal which is to compete at the highest level that you can and push your abilities to see what you can accomplish, which you might enjoy doing. If you aim for this there's also
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by joe__f 5y ago
I agree with the overall idea, that many papers in mathematics and related fields could benefit from their authors spending more time on their writing style. I disagree with most of their suggested ways of doing this. * Grandmothering: I di
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by joe__f 5y ago
I don't know how much this type of bird weighs, but I imagine 5g for the tracker is a small percentage of its overall weight
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by joe__f 5y ago
When I tired the 'project on globe' feature, it put a tiny rectangle of the map about the size of the UK on a big black globe. Presumably not intended behaviour. Otherwise very cool
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by joe__f 5y ago
I know this is bad for nature and all I want to support the eels, but I just can't stop myself giggling every time I see it
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by joe__f 5y ago
I had a look through this and I didn't get the main idea. I understood that it you take a grammatical sentence in Swiss German and swap the accusative and dative cases around for one or more nouns, you get an ungrammatical sentence. I
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by joe__f 5y ago
I meant 'previous' not 'precious'. How can I edit a post I made? I've seen what I think was other people editing their posts

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