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ColinWright

136,194karma·18,658submissions·December 14, 2009
about
If you want to contact me, find me on the web. I am especially interested in math, juggling, programming, and education, and since there are other people with my name you'll probably need to include at least one of those terms in any search.

I was once a prolific contributor and commenter, but no more. I go through bouts of submitting stuff, but then go and disappear for lengths of time. If there is something you'd like me to see or comment on, you can email me. Don't ask me to upvote things. If it is interesting (to me) then I will.

Submissions do not imply endorsement.

My spam filtering is pretty severe, but I've put the word "Dysprosium" on the allow-list - quote that and your email will get through.

I used to have an email here but it got harvested by spammers - I'm looking at you, mbientlab.com - so it has been removed. This is a temporary one:

HN_a7dab8S4@solipsys.co.uk

Email sent there and quoting the element name will pass my spam filters. After that we can use "proper" email addresses.

recent activity (18,658 total)
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Related: http://news.ycombinator.com/item?id=2596700
15y ago·view thread
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Yes, and shifting is the same as multiplying by -2. Fun! Can you do it without negative signs?
15y ago·view thread
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Looks right to me. Hope you found it an interesting exercise!
15y ago·view thread
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I also have an answer. Do you blog? Perhaps you could write up your answer and point us at it. Otherwise, I don't have a problem with you giving us your answer, although others might like to think ab…
15y ago·view thread
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The "10" in the question is in base (9+1). The question is to produce a sequence in base -2 starting with 1 and taking 9 steps forwards.
15y ago·view thread
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For a non-pilot that's a difficult read, but worthwhile to understand the issues involved and implications. Thank you.
15y ago·view thread
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Here are two discussions from previous submissions - there were a dozen or so comments on each: http://news.ycombinator.com/item?id=2379419 http://news.ycombinator.com/item?id=2382850 There were m…
15y ago·view thread
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OK - I've now seen a "solution" with 16 "pieces." My head hurts.
15y ago·view thread
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That gives two infinite families. However, those families contain more examples than your process generates, there is another infinite family, there is a sporadic, and I have just been shown another …
15y ago·view thread
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Clickable: http://www.twotruths.me/
15y ago·view thread
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And yet you don't have a link to it in your profile, or link to it from your comment. This doesn't inspire confidence.
15y ago·view thread
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Title and timing are everything - I submitted this story yesterday and got no upvates, and no comments: http://news.ycombinator.com/item?id=2584908 Don't mistake me - this isn't a complaint. It's a…
15y ago·view thread
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Specific Emo reference: http://www.youtube.com/watch?v=BDmeqSzvIFs
15y ago·view thread
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Previous discussions: http://news.ycombinator.com/item?id=1326899 http://news.ycombinator.com/item?id=1326265 http://news.ycombinator.com/item?id=1326214 <- This has lots of comments…
15y ago·view thread
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OK, that's now the set of solutions I've got. You've also gone some way to showing them to be complete. More to do, though. And now do it for an equilateral triangle.
15y ago·view thread