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- Figure 16.1.2. f(x, y) =x2 +y2 f (x, y) = x 2 + y 2 As in this example, the points (x, y) (x, y) such that f(x, y) = k f (x, y) = k usually form a curve, called a level curve of the function. A graph of some level curves can give a good idea of the shape of the surface; it looks much like a topographic map of the surface.
www.whitman.edu/mathematics/calculus_late_online/section16.01.html
A graph of the various level curves of a function is called a contour map. Example: Making a Contour Map Given the function [latex]f\,(x,\ y)=\sqrt{8+8x-4y-4x^{2}-y^{2}}[/latex], find the level curve corresponding to [latex]c=0[/latex].
Level curves. One way to collapse the graph of a scalar-valued function of two variables into a two-dimensional plot is through level curves. A level curve of a function $f(x,y)$ is the curve of points $(x,y)$ where $f(x,y)$ is some constant value.
Nov 16, 2022 · The level curves of the function \(z = f\left( {x,y} \right)\) are two dimensional curves we get by setting \(z = k\), where \(k\) is any number. So the equations of the level curves are \(f\left( {x,y} \right) = k\). Note that sometimes the equation will be in the form \(f\left( {x,y,z} \right) = 0\) and in these cases the equations of the ...
Example 1. Let $f(x,y) = x^2-y^2$. We will study the level curves $c=x^2-y^2$. First, look at the case $c=0$. The level curve equation $x^2-y^2=0$ factors to $(x-y)(x+y)=0$. This equation is satisfied if either $y=x$ or $y=-x$. Both these are equations for lines, so the level curve for $c=0$ is two lines.
Jul 10, 2017 · Level sets, the gradient, and gradient flow are methods of extracting specific features of a surface. You’ve heard of level sets and the gradient in vector calculus class – level sets show slices of a surface and the gradient shows a sort of 2D “slope” of a surface.
Dec 29, 2020 · Example \(\PageIndex{3}\): Drawing Level Curves. Let \(f(x,y) = \sqrt{1-\frac{x^2}9-\frac{y^2}4}\). Find the level curves of \(f\) for \(c=0\), \(0.2\), \(0.4\), \(0.6\), \(0.8\) and \(1\). Solution. Consider first \(c=0\). The level curve for \(c=0\) is the set of all points \((x,y)\) such that \(0=\sqrt{1-\frac{x^2}9-\frac{y^2}4}\).
Oct 3, 2022 · The graph of a function of two variables is a surface in \(\mathbb{R}^3\) and can be studied using level curves and vertical traces. A set of level curves is called a contour map. Key Equations
