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Aaron Parecki

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#math

  • 0.30000000000000004 - Floating Point Math (0.30000000000000004.com)
    Fri, Nov 13, 2015 1:44pm -08:00 #floatingpoint #math #cs
  • Why 5 x 3 = 5 + 5 + 5 Was Marked Wrong (medium.com)
    Sat, Oct 31, 2015 10:51am -07:00 #math #cs
  • Cheryl's Birthday: Singapore's maths puzzle baffles world - BBC News (www.bbc.com)
    Tue, Apr 14, 2015 6:27pm -07:00 #cherylsbirthday #singapore #math #puzzle
  • The Saddest Thing I Know about the Integers (blogs.scientificamerican.com)
    When we tune an instrument, we would like for all our octaves and fifths to be perfect. One way to tune an instrument would be to start with a pitch and start working out the fifths above and below it it. We start with some frequency that we call C. Then 3/2 times that frequency is G, 9/4 times that frequency is D (an octave and a step above our original C), and so on. If you learned about the “circle of fifths” at some point in your musical life, then you know that if we keep going up by fifths, we’ll eventually land back on something we’d like to call C. It takes a total of 12 steps, and so if we keep all our fifths perfect, the frequency of the C we get at the end is 312/212, or 531441/4096, times the frequency of the C we had at the beginning. You might notice that 531441/4096 is not an integer, much less a power of 2, so our ears would not perceive the C at the end as being in tune with the C at the beginning. (531441/4096 is about 130, which is 2 more than a power of 2, so we would hear the C at the top as being sharp.) And it’s not a problem with the assumption that it takes 12 fifths to get from C to shining C. We can never get perfect octaves from a stack of fifths because no power of 3/2 will ever give us a power of 2.
    Mon, Dec 1, 2014 1:18pm -08:00 #piano #music #math
  • HyperLogLog — Cornerstone of a Big Data Infrastructure (research.neustar.biz)
    Fri, Apr 18, 2014 2:33pm -07:00 #hyperloglog #math #stats
  • HyperLogLog (antirez.com)
    Fri, Apr 18, 2014 2:22pm -07:00 #hyperloglog #math #redis #stats
  • How many types of jigsaw puzzle pieces in n dimensions? (mathoverflow.net)
    Thu, Jan 2, 2014 9:55pm -08:00 #combinatorics #dimensions #dreeves #jigsaw #math #puzzle
  • Prime factoring with PHP (www.thatsgeeky.com)
    Thu, Aug 4, 2011 1:10am -07:00 #algorithm #cryptography #factors #math #prime
  • The Cicada Principle and Why It Matters to Web Designers (designfestival.com)
    Thu, Apr 7, 2011 8:33am -07:00 #background #css #graphics #images #math #nature #primes #tiling #tutorials #web design
  • Aaron Parecki
    __Infinity mathematicians walk into a bar. The first orders a beer. The second orders half a beer. The third orders a quarter beer, etc etc. How long until the bartender runs out of beer?__

    First person to answer correctly with a full explanation gets a free beer next time we meet.
    Sun, Jan 16, 2011 11:31am -08:00 #beer #humor #infinity #joke #math
  • Math for Primates Podcast (www.mathforprimates.com)
    Thu, Apr 29, 2010 2:17am -07:00 #blog #education #fun #math
  • Amber Case - An Introduction to Hyperbolic Geometry (www.youtube.com)
    Thu, Mar 4, 2010 4:22pm -08:00 #caseorganic #geometry #math #video
  • Math Puzzle « xkcd (blog.xkcd.com)
    Tue, Feb 16, 2010 9:49am -08:00 #math #puzzle #xkcd
  • Mathematically Correct Breakfast -- Mobius Sliced Linked Bagel (www.georgehart.com)
    Sat, Dec 12, 2009 1:58pm -08:00 #bagel #food #fun #math
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Hi, I'm Aaron Parecki, Director of Identity Standards at Okta, and co-founder of IndieWebCamp. I maintain oauth.net, write and consult about OAuth, and participate in the OAuth Working Group at the IETF. I also help people learn about video production and livestreaming. (detailed bio)

I've been tracking my location since 2008 and I wrote 100 songs in 100 days. I've spoken at conferences around the world about owning your data, OAuth, quantified self, and explained why R is a vowel. Read more.

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