What are the common ways to define proximity between two sentences ? I did various tries, including:
either using the counts for the Jaccard and Cosine "metrics" or the TFIDF for the cosine similarity. They performed relatively well.
Some (string specific) kernels can be adapted as well:
And general kernels can be applied (Polynomial, Gaussian, Information diffusion...)
Am I missing any possible similarity measure ? Is any state-of-art in defining metrics over texts available ?