The teacher is recommended, before assigning any lesson, to occupy the time of at least two or three recitations, in …
The first in the family of best-selling vocabulary reference and practice books from elementary to advanced level. Vocabulary is clearly …
There are many technical and popular accounts, both in Russian and in other languages, of the non-Euclidean geometry of Lobachevsky …
Classroom-tested and much-cited, this concise text offers a valuable and instructive introduction for undergraduates to the basic concepts of topology. …
