Miscellaneous tricks and tips
- fs setacl . system:anyuser read
allow anyone to read current directory
- If A, B, and C are square matrices, then tr ABC = tr BCA = tr CAB.
- ∇A tr AB = BT
- ∇AT f(A) = (∇A f(A))T
- ∇Atr ABATC = CAB + CTABT
- ∇A|A| = |A|(A-1)T if A is a non-singular square matrix.
Comments to Chuong Do ()