{'fraction_non_alphanumeric': 0.02660332541567696, 'fraction_numerical': 0.009501187648456057, 'mean_word_length': 5.139941690962099, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Vladimir Aleksandrovich Il'in (on his 80th birthday)

On 2 May 2008 Vladimir Aleksandrovich Il’in, full member of the Russian Academy of Sciences, observed his 80th birthday. Il’in is known for his outstanding achievements in the theory of boundary-value and mixed problems for equations of mathematical physics considered in domains with ‘bad’ (non-smooth) boundaries and having discontinuous coefficients, in the question of the connection between classical and generalized solutions of problems in mathematical physics, in mathematical modelling of problems involving diffraction of electromagnetic waves on non-smooth surfaces, in the spectral theory of selfadjoint elliptic operators, in the theory of multiple Fourier series and integrals, in the spectral theory of non-selfadjoint differential operators, in the spectral theory of Schrödinger operators with strongly singular potential, and in the theory of optimization of boundary controls of oscillatory processes. He was born on 2 May 1928 in the ancient Russian town of Kozelsk, where he lived in his grandfather’s house with a huge garden on a street on the outskirts of town known as Maloe Zarech’e (Little Riverside). The grandfather in whose house he lived was a painter of icons, and the other grandfather, and grandmother, came from very successful merchant families. In 1931 Il’in’s father Aleksandr Sergeevich, a mathematics teacher, and mother Elizaveta Ivanovna, a student at the Pedagogical Institute (known then as ‘the second Moscow State University’) moved with their three-year-old son to Moscow. From this time on the boy was always with his favourite grandmother Anna Konstantinovna, who undoubtedly played an important role in the development of his personality. She taught the four-year-old Volodya to read and write, and to love poetry and try to write his own poems. At five years of age he knew the multiplication table and the squares of all the natural numbers up to 20. At the same time he was engrossed in geography, knew all the large cities of the world, and could draw accurate maps of countries and continents. He