The irony is that this meme works in reverse for that. At least, in order of mind blowing as I refreshed my memory, it goes multiplication (very easy), dot (scalars easy), cross (vectors medium) and convolution (integrals hard).
In fact, I never did the later two but convolution looks fun.
No. If a is a scalar, which it clearly is, it’s all multiplication. And there is no reason to use any of the first three. We say “three apples”, not “three x apples”.
What they actually see:
The irony is that this meme works in reverse for that. At least, in order of mind blowing as I refreshed my memory, it goes multiplication (very easy), dot (scalars easy), cross (vectors medium) and convolution (integrals hard).
In fact, I never did the later two but convolution looks fun.
I see multiplication in code, Cartesian product, multiplication, multiplication.
I might not count as a mathematician though. If the * was supposed to be convolution the a should have been cursive.
No. If a is a scalar, which it clearly is, it’s all multiplication. And there is no reason to use any of the first three. We say “three apples”, not “three x apples”.
hurr durr maybe it’s a vector in ℝ