- #1
icurays1
- 8
- 0
Stupid thing I noticed today:
[tex]\nabla^2 U=tr(H(U))[/tex]
Or, in other words, the Laplacian of a function is just the trace of its Hessian matrix. Whoop-de-frickin do, right? Is this useful knowledge or should I forget it immediately?
N!
[tex]\nabla^2 U=tr(H(U))[/tex]
Or, in other words, the Laplacian of a function is just the trace of its Hessian matrix. Whoop-de-frickin do, right? Is this useful knowledge or should I forget it immediately?
N!