This book is very much in the spirit of the modern Russian school concerned with the so-called constructive theory of functions, approximative methods for the solution of differential equations, and so forth.
Ang librong ito ay tunay marami sa diwa ng mga modernong Russian paaralan na may nag-aalala ang tinatawag na constructive teorya ng pag-andar, approximative paraan para sa solusyon ng mga kaugalian equation, at iba pa.