At the gymnasium, Boleslav Kornelievich immediately stood out for his talent and interest in his studies. His mathematical talent showed up very early, but, along with mathematics, he was interested in all subjects and, by the way, became an expert in ancient languages ​​and a connoisseur of classical literature.

... read a total of 66 reports at the Society's meetings. He was not only an excellent speaker, but also an irreplaceable, if one can put it that way, listener to other people's reports: he grasped the essence of the matter unusually quickly and almost always made a number of interesting comments, and sometimes additions to the report.

... there was a paradoxical juxtaposition of growing government concern for education with a major crisis in state-university relations. While the government reiterated its preference for technical higher education, the professoriate pressed its claim that the universities should be the centrepiece of the nation's system of higher education. Meanwhile the government showed little regard for the professoriate's prerogatives as it initiated a ruthless campaign to suppress student unrest, which revived after Leo Tolstoy's death in November 1910. The result was a major crisis epitomised by the mass resignations of the Moscow University faculty in 1911 and mass expulsions of students.
...
On 11 January the government issued a circular that banned student meetings on the premises of all university institutions and directed the police not to wait for an invitation from the faculty councils before breaking up gatherings and arresting participants. The circular also ordered the professors to call in the police at the first sign of trouble. ... By the first week of February, a strike had become nationwide, involving both universities and the specialised technical institutes. ... the professoriate found itself in a quandary. Opposing both the 11 January circular and the strike, the professors continued to lecture. Students responded by obstructing classes; even popular teachers with liberal reputations were hooted down.

In Moscow University, the situation escalated rapidly. Rector Manuilov was prepared to cooperate with the authorities. But as police stormed into the university uninvited, to apprehend students taking part in banned meetings, they arrested innocent bystanders as well as activists. These actions, as Manuilov complained to the faculty council, not only deterred moderate students from coming to classes but also had a radicalising effect on the whole student body. When their efforts to curb police interference failed, Manuilov, assistant rector M A Menzbir, and protector P A Minakov decided to resign. On 28 January, the rector explained to the faculty council that although the police tried to behave correctly the 11 January circular had created an "intolerable state of dual power in the university." The three resigned their administrative, not their academic, posts and offered to continue serving in the former until replacements could be found.

Now came the surprise. Minister of Education Kasso ... dismissed the three professors from their university duties. ... The Moscow University Faculty Council, in a 2 February emergency meeting, told the government that unless the three professors were reinstated, many of their colleagues would be forced to resign. [The government] refused to compromise, and Moscow University tottered on the brink of ruin. By 20 February twenty-five full professors and seventy-four junior faculty members had resigned from the university - more than one-third of the teaching staff. The natural sciences faculty was especially hard-hit. Most of those who resigned did not return to Moscow University or, indeed, to service in any university institution controlled by the Ministry of Education. Many did, however, find positions in the independent Shanyavsky University ...

... did not survive the difficult years of 1918-1919 easily. He suffered greatly from material deprivation and backbreaking work, and then his wife's dangerous illness brought him much grief. The following years brought some relief, but in the last year of his life Mlodzeevsky was excessively overloaded with work: he simultaneously held the duties of professor at the 1st and 2nd Universities, taught at the Academy of Social Education, was director of the Research Institute of Mathematics and Mechanics, and chairman of subject commissions at both Universities; in addition, after the death of Professor A K Vlasov, Mlodzeevsky considered it his duty to take over his lectures at the University and at the Institute of National Economy; to this should be added the work of publishing courses in analytical geometry and algebra and editing the translation of Édouard Goursat's book 'Cours d'analyse mathématique'.

Other, smaller works by Mlodzeevsky relate partly to geometry, partly to analysis, partly to applied sciences. In most cases they contain a clever and elegant solution to some problem that either had not been solved, or had been solved earlier, but by a less perfect method. In this direction, it is especially necessary to note the work "On the polynomials that deviate least from zero" in which a well-known result is obtained, but in the simplest and most elegant way ... In the last years of his life, Mlodzeevsky began to work in the field of algebraic geometry, especially on the theory of Cremona transformations.

Without listing separately all the works of Mlodzeevsky, we will only say that all of them, to a greater or lesser extent, bear the stamp of the author's personality and testify to the versatility of his interests, his brilliant gift for exposition and the wit of his mathematical thought.