Frobenius distance between the matrix $X_{n}^{\phantom{n}k}$ and $H_n^{\phantom{n}r} …
Levenshtein distance calculates the number of operations needed to change one word to another by …
n-gram is a method to split words into set of substring elements so that those can be used to match …
As simple as the inner product of two vectors $$ d_{cos} = \frac{\vec A}{\vert \vec A \vert} \cdot …
To find the eigenvectors $\mathbf x$ of a matrix $\mathbf A$, we construct the eigen equation $$ …
Jaccard index is the ratio of the size of the intersect of the set and the size of the union of the …
Choose X from N is $$ C_N^X = \frac{N!}{ X! (N-X)! } $$
Differential transformation method can be used to solve differential equation even …
Calculate the area enclosed by a line
Eigenstates of a very special matrix
An identity about integral
Symmetry of second derivatives