Visualization of a numerical method for determining the type of extrema of functions with two variables on a contour map without using derivatives. 4.0
f(x, y) = 3 (1 - x²) ℯ-(x - 0.5)² - (y + 1)² - 2 (x / 5 - x³ - y⁵) ℯ-x² - y² sin(x - y)
*Detailed instructions and explanations for this applet can be found in the previous applets 1, 2 and 3. 