ECON4120 - Mathematics 2: Calculus and Linear Algebra

Semester page for ECON4120 - Autumn 2011

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I was made aware of …

I was made aware of an embarrassing error in the solution note for exam Autumn 2007, problem 1, one of the |A|=0 cases, namely u=1. The conclusion is correct, but do not get confused by the error for this case.

(It has been available for eight semesters before anybody noticed :-o )

Dec. 14, 2011 2:03 PM
I have promised to be …

  • I have promised to be available, but on the other hand I would like to catch a few of the lectures for the Haavelmo symposium Tuesday/Wednesday.
  • The solution is that you send me an SMS text -- then I can be back in office Blindern on ... say, an hour-ish notice (except Tuesday evening). Phone 90163893.
  • I am aware that some of you may be reluctant to do so, but please do not hesitate to send a text if you need assistance. (I would very much like to say 'it is an order!') Update: Hey, some of you have already texted me, fine! Bring'em on.
  • Also, there are chances that Arne Str?m (room 1119) will be available (not before lunch), or Knut Syds?ter (not on Tuesday).

Dec. 12, 2011 12:38 PM
And, yet another lecture glitch: …

And, yet another lecture glitch: In the problem set, problem 2 alternative II, part (a) was about calculating the elasticity of y wrt. x, not the derivative y' which I wrote down.

The elasticity is xy'/y, so you add another line to my exposition by multiplying that answer by x/y.

This error did not affect the calculations for part (b), the elasticity of substitution.

Dec. 8, 2011 1:44 AM
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