When mathematicians refer to Ramanujan, they are talking about geniuses who self-educate and make lots of contributions. (VNese) Nghe kể GS Lê Văn Thiêm hồi xưa trong bom đạn tự làm Toán và mang kết quả đi làm luận án tiến sĩ,
I can’t help laughing while reading the examples for these ten signs. This is very enjoyable! Note the context: this blogger is a mathematician, frequently receives review requests, here he discussed about requests to read proofs for famous (unsolved) mathematical problems.