Zobrazeno 1 - 4
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pro vyhledávání: '"I. S. Vorob'ev"'
Autor:
I. S. Vorob’ev, A. V. Ustinov
Publikováno v:
Sbornik: Mathematics. 210:1690-1701
In the theory of numerical semigroups the Frobenius problem of finding the largest integer that does not belong to the given semigroup plays an important role. The study of the Frobenius problem suggests distinguishing the class of symmetric semigrou
Autor:
I S Vorob'ev
Publikováno v:
Sbornik: Mathematics. 207:816-840
Asymptotic formulae for the mean values of various characteristics of the additive semigroup generated by three positive integers are obtained theoretically, the first of which is a formula for the number of integers not belonging to this semigroup.
Publikováno v:
Russian Journal of Applied Chemistry. 88:394-397
Original method for synthesis of LiFePO4/LiTi2(PO4)3 composite material is suggested. The method includes mechanical activation of a precursor in a high-pressure apparatus of the type of Bridgeman anvils. Electrodes prepared on the basis of this mate
Publikováno v:
Russian Journal of Applied Chemistry. 87:734-737
Method for synthesis of double lithium-titanium phosphate is suggested. The method includes mechanical activation of the precursor and makes it possible to reduce the temperature and shorten the annealing duration when reaching a highly dispersed sta