Mamata Banerjee also alleged irregularities in the vote count and assault, (Aaj Samaj), Kolkata: Former West Bengal Chief Minister Mamata Banerjee has filed a petition in the Calcutta High Court. Through the petition, Mamata has demanded an investigation into the validity of the election results. In fact, BJP's Suvendu Adhikari defeated Mamata Banerjee by 15,105 votes in the Bhawanipur seat. Mamata has previously held the seat for three terms. D…