Ole Bakstad's blog

So I’m over at Mats‘ blog reading about “123-meming with Christer”. You’re probably asking; “What the hell is 123-meming?”. The every same question did I ask myself while reading his post. It turns out that 123-meming is the following:

1. Pick up the book closest to you
2. Open page 123
3. Find the 5th sentence…
4. …and publish the next three sentences
5. Link to 5 other bloggers and tell who linked you

So here we go! The  book closest to me was “Elementary Linear Algebra” by C. H. Edwards, Jr. and David E. Penny (why is this the book closest to me, shouldn’t I be reading physics?). The chapter is named “Vectors in the Plane and in Space”. Here are the three sentences:

Thus every vector is a linear combination of the two vectors i and j. Such linear combinations of vectors may be manipulated exactly like combinations of real numbers. For instance, if

a = a₁i+a₂j and b = b₁i +b₂j

then

a + b = (a₁i+a₂j) + (b₁i +b₂j)
= (a₁ + a₂)i + (b₁ + b₂)j

and

ca = c(a₁i+a₂j)
= (ca₁)i + (ca₂)j.

Thank you, Mats, for handing the meme over to me! It just took about 15 minutes to write the damn equations in wordpress!

Since the only other person in my blogroll is Øyvind i leave it up to him to carry this meme on!

Again, thank you Mats!