10 Year. Morningstar rated the Global Technology Fund among 196, 196, 186 and 144 Technology funds for the overall rating and the 3-, 5-, and 10-year periods (as applicable) ending 02/28/2017, respectively.
Geometrically an eigenvector, corresponding to a real nonzero eigenvalue, points in a direction that is stretched by the transformation and the eigenvalue is the factor by which it is stretched. If the eigenvalue is negative, the direction is reversed.
This is E field of the Math class which returns you a default exponent value that is closer than any other to e, the base of the natural logarithms. PI. This is also a field of the Method class which returns you a default pi value, the ratio of the circumference of a circle to its diameter.