Math Type Question

I wasn't sure were to post this but here is my question...

I have this formula type thing to fill a 4*4 matrix (for directx) but they use 3 functions that I have no clue about.

Code:

---

zaxis = normal(At - Eye)
xaxis = normal(cross(Up, zaxis))
yaxis = cross(zaxis, xaxis)
   
 xaxis.x          yaxis.x          zaxis.x          0
 xaxis.y          yaxis.y          zaxis.y          0
 xaxis.z          yaxis.z          zaxis.z          0
-dot(xaxis, eye)  -dot(yaxis, eye)  -dot(zaxis, eye)  1

---

I don't know normal, cross, or dot. I tried to look them up but didn't get far, I think I have a little understanding of dot though.

Perhaps these?

• http://en.wikipedia.org/wiki/Normal_matrix
• http://en.wikipedia.org/wiki/Dot_product
• http://en.wikipedia.org/wiki/Cross_product