In the work of Doctor of Philosophy A.S. Novikov, based on the method of temporal analysis, the problems of the foundations of the classification of innovations in the system of scientific activity are investigated: genetic and procedural aspects of repeated discoveries, structural and functional features of simultaneous, premature and belated discoveries, forms of non-recognition of scientific ideas and priorities. The book will attract the attention of students, graduate students, scientists, as well as everyone who is interested in the problem of scientific creativity.