Micro blogging tools provide a real time service for the public to express opinions, broadcast news and information offer an opportunity comment respond such output. Word usage in social media is continually evolving. bloggers may use different sets of words describe specific event they new (i.e. neither exist training dataset nor informal or formal dictionaries) contexts. Dynamically capturing...

this text carries out some ideas about exact and p− exact sequences of transformationsemigroups. some theorems like the short five lemma (lemma 1.3 and lemma 2.3) are valid here as inexact sequences of r − modules.