‘Your strong voice a tremendous source of strength for me’: Amartya Sen writes back to Mamata "I am very happy indeed to get your supportive letter. I am not only most touched, but also very reassured that despite the busy life you have to lead, you can find time for reassuring people under attack..." Amartya Sen wrote. Updated: December 28, 2020 8:04:01 pm West Bengal CM Mamata Banerjee had written to Nobel laureate Amartya Sen. (File photo) Referring to West Bengal Chief Minister Mamata Banerjee as “Dear Mamata”, Nobel Laureate Amartya Sen has written back to her and thanked her for supporting people like him who are under attack.