HN user

sz

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www.youtube.com 15y ago

Chris Kraft (NASA) lecture at MIT

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3pts0
www.w3.org 15y ago

Socially Aware Cloud Storage

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1pts0
apply.thielfellowship.org 15y ago

Thiel Fellowship Application Goes Live

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28pts6
news.ycombinator.com 15y ago

Ask HN: Particularly elegant programs to study?

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44pts24
www.physorg.com 15y ago

Scientists find damage to coral near BP well

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2pts1
english.aljazeera.net 15y ago

BP dispersants 'causing sickness'

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2pts0
www.nola.com 15y ago

Massive stretches of weathered oil spotted in Gulf of Mexico

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30pts1
vimeo.com 15y ago

Stephen Fry: What I Wish I'd Known When I Was 18

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3pts0
www.google.com 15y ago

Clown elected to Brazilian Congress

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4pts2
www.anandtech.com 15y ago

Context-aware Computing: Intel Paints the Future of Devices

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1pts0
possibility.com 15y ago

All the world is a DOM. The rise of Identity Based Programming.

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en.wikipedia.org 15y ago

Wikipedia lets you create books

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106pts22
www.youtube.com 15y ago

Steve Jobs explains branding

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260pts85
personalpages.manchester.ac.uk 15y ago

Real time face tracking/recognition on a Nokia N900

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1pts0
www.kickstarter.com 15y ago

Punk Mathematics

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139pts17
news.ycombinator.com 15y ago

Ask HN: Career opportunities with Haskell?

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15pts13
news.ycombinator.com 15y ago

Ask HN: What if nothing works out?

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58pts52
news.ycombinator.com 15y ago

Ask HN: How do you find out about local tech events?

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1pts1
www.techi.com 16y ago

Super Mario Bros Augmented Reality

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53pts9
news.ycombinator.com 16y ago

Ask HN: Should I accept an unpaid internship?

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2pts2
pauli.uni-muenster.de 16y ago

On Teaching Mathematics

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blog.ezyang.com 16y ago

Databases are Categories

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24pts2
en.wikipedia.org 16y ago

Curry-Howard correspondence

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5pts1
news.ycombinator.com 16y ago

Google looking different suddenly

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1pts1
news.ycombinator.com 16y ago

Formal methods in a startup?

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1pts1
Best Jobs of 2011 16 years ago

I was surprised to see Mathematician as #2. That contradicts everything I've read about math careers on HN.

Hm, this might explain something. In old B&W videos people's impromptu speech seems much more eloquent than today. I wonder if the luxury of instant text communication has something to do with it.

Why are people still talking about this?

It's like complaining that a Lamborghini sucks because the cupholders are hard to reach. I'm sure it would bother some people, but it's not really worth discussing, is it?

Just some immediate first impressions.

- The logo looks small and isolated from the rest of the page.

- The text in the navigation tabs looks strange, maybe it should be centered?

- The boxes with the slight shading are missing vertical borders, which looks unfinished.

- The circles with the prices are not ordered numerically, which was confusing at first glance. Also the text labels in the image are too small.

- The font size for the description paragraphs is too small; looks like fine print.

- The colors for the Buy/Learn buttons at the top are badly chosen; when I hover over one, it looks like they're both active or inactive since they're the same color. There should be four different colors or they should be identical.

- Not sure why "Required" was abbreviated to "Req'd" when adjacent cells have much more text.

I was wondering what subfield coined the label $\Pi_2$, specifically. I haven't looked much into the structure of propositions and proofs per se, and I'm curious about what can be said about it.

"Since is formally a for-all/there-exists ($\Pi_2$) statement of arithmetic, there is a principle that such a proof should be convertible to one without contradiction"

Where can I find more information about this sort of thing?

I was thinking about exactly this yesterday - so much of "media matter" is like junk food for the mind. I wondered if we could start an organic movement but for the content industry.

It took me a while to gain enough confidence to start thinking, "well I was ecstatic about this idea yesterday, so there must be something good here".

Now I try to remember specifically what excited me. Not as a bullet point, but as a vision. What was the cool task I imagined accomplishing? What was I thinking of when I felt like I had the right answer? Usually that's enough to get me back in the same state of mind.

But keep talking yourself out of ideas. That's the only way to get rid of bad ones. Just don't forget the good parts. Ideas evolve; let natural selection run its course.

A good read every time. This part stood out:

"In retrospect I realize that in almost everything that we worked on together, we were both amateurs. In digital physics, neural networks, even parallel computing, we never really knew what we were doing. But the things that we studied were so new that no one else knew exactly what they were doing either. It was amateurs who made the progress."

How I do Proofs 16 years ago

I didn't read the descriptions before, they do make it clear.

I was just saying that you can't apply a technique you don't know.

How I do Proofs 16 years ago

(1) When I see the phrase "known techniques" in the context of math it generally refers to techniques known in the field. Novel techniques are not "known" in this sense. The different, literal, trivial interpretation of "known" makes the word superfluous. That was the motivation for my first comment. In both cases (your point of view being the second) my comment is true; by this flowchart a technique must be known to be applied. The only way I could see someone disagreeing is if they're confused about what "known" means.

(2) It seemed obvious, and moreover too trivial a point to merit more than just pointing it out. I apologize if I've caused any offense.

* To clarify, I don't consider "find a new technique" to be a technique, which is why I said to look at the arrows.

How I do Proofs 16 years ago

So the only way to solve a problem is by applying known techniques, apparently.