"14" Result
Sort By:
![Nonlinear wave equations [elektronisk resurs]](https://covers.openlibrary.org/b/isbn/9781470422745-M.jpg?default=false)
"The winding number is one of the most basic invariants in topology. It measures the number of times a moving point P goes around a fixed point Q, provided that P travels on a path that never goes through Q and that the final position of P is the same as its starting position. T…
