Identi.ca Identi.ca
  • Login
  • Public

    • Public
    • Groups
    • Featured
    • Popular

Conversation

Notices

  1. Bradley M. Kuhn Bradley M. Kuhn

    Just read 1.2.11.1 in #Knuth's #TAoCP. Realize no teacher (even in grad school) ever gave me formal math defn of O(f(n)). Easier that way!

    Monday, 11-Jul-11 01:53:35 UTC from mustard
    • Daniel Devine Daniel Devine

      @bkuhn There's lots of things that maths teachers say but never explain. They just assert things.

      Monday, 11-Jul-11 02:01:05 UTC
    • Bradley M. Kuhn Bradley M. Kuhn disturbing , Daniel Devine

      @ddevine, at grad CS level, I was never presented w/ formal definitions of O(f(n)) & Θ(f(n)). I even took Complexity Theory! !disturbing

      Monday, 11-Jul-11 12:08:37 UTC
    • Daniel Devine Daniel Devine

      @bkuhn That is disturbing. I think however that I have had it explained more than once. I still *really* suck at maths though.

      Monday, 11-Jul-11 15:29:29 UTC
    • Dave Neary Dave Neary

      @bkuhn I learned it as "the fastest growing term w/o coeff in the expression for the number of ops used by an algorithm with n elements"

      Monday, 11-Jul-11 16:09:08 UTC
    • Dave Neary Dave Neary

      @bkuhn I also learned that the coefficient is almost always dominant with small data sets and the O() only matters for big data sets.

      Monday, 11-Jul-11 16:09:49 UTC
    • Dave Neary Dave Neary

      @bkuhn Actually, I don't think that was the definition. That was the explanation. Never mind.

      Monday, 11-Jul-11 16:29:12 UTC
    • Nathan Willis Nathan Willis Dave Neary

      @nearyd @bkuhn I think the "real" definition is pretty slim— f=O(f') iff |f(x)| is less than |f'(x)| for all x after a certain point, etc

      Monday, 11-Jul-11 17:09:28 UTC
    • Nathan Willis Nathan Willis Dave Neary

      @nearyd i.e., like a limit the tricky part is finding it, not testing whether a candidate complies.

      Monday, 11-Jul-11 17:14:02 UTC
    • Clacke Moved to Unlimited Clacke Moved to Unlimited

      @bkuhn Wow, that *is* #disturbing. In my uni we got the formal definition during our first algorithms course.

      Tuesday, 12-Jul-11 02:16:23 UTC
    • Bradley M. Kuhn Bradley M. Kuhn Clacke Moved to Unlimited , Dave Neary

      @clacke, I think I am basically outing myself that I went to schools that didn't have particularly good CS departments, frankly. cc: @nearyd

      Tuesday, 12-Jul-11 11:27:17 UTC
    • Clacke Moved to Unlimited Clacke Moved to Unlimited

      @bkuhn Hey, you are the victim, not the perpetrator. Anyway, seems to have worked out ok in the end. :-)

      Tuesday, 12-Jul-11 11:50:47 UTC

Site notice

Identi.ca is converting to pump.io on 1 June 2013

Feeds

  • Activity Streams
  • RSS 2.0
  • Atom
  • Help
  • About
  • FAQ
  • TOS
  • Privacy
  • Source
  • Version
  • Contact

Identi.ca is a microblogging service brought to you by E14N. It runs the StatusNet microblogging software, version 1.1.0-release, available under the GNU Affero General Public License.

Creative Commons Attribution 3.0 All Identi.ca content and data are available under the Creative Commons Attribution 3.0 license.

Switch to mobile site layout.

Built in Montreal