Gou Ming weep when the dog
Treacherous village, weeping Ming Gou dog, the disintegration of the mind, the endless cycle of ......
The number of combinations
It is derived from a combination of sense
- \(\sum_{i=0}^{n} \binom{n}{i}^2\)
- \(\sum_{i=0}^{n} i\binom{n}{i}\)
- \(\sum_{i=m}^{n} \binom{i}{m}\)
- Cattleya number
- Stirling number
Multiplicative function
- \ (I (X) \) : identity function, \ (E (X) \) : the original function. \ (I * \ Phi \) , \ (I * \ Mu \)
- \(\sum_{i=1}^{n} \mu(i), \sum_{i=1}^{n} \phi(i)\)
Treacherous construction
- Lagrange Interpolation
- EXCRT