In order to obtain word representation through its characters, in the simplest strategy, character vectors are integrated into their word representation using a weight matrix W (L) that is shared across all words with the same length L, followed by a non-linear function g(•).
c i (1 ≤ i ≤ L) are d-dimensional character vector representations respectively, the corresponding word vector w will be d-dimensional as well: where W (L) ∈ R d×Ld and g is a non-linear function as mentioned above.