/sci/ - Science & Math

>>14504599
Depends on what you're after. You can probably get a handheld whiteboard (which you can then perhaps mount on to something with minimal tooling) for cheap online.

>>11601941
My bad, I make a mistake earlier.
You see, the sum starts at [math]0[/math], so the vector space actually has dimension [math](d+1)^2=d^2+2d+1[/math].
Then you can choose [math]d^2+2d+1-1[/math] random points and make the functional annihilate them.