for $f(x,y)=(x^2-y^2,2xy)$ Sketch f(A) for $x>0$
139436
Show function $f(x,y)=(x^2-y^2,2xy)$ is $1$-$1$ by Inverse Function Theorem
98255
Find $f(x)$ such that $f(f(x)) = x^2 - 2$
149879
Sketching base characteristics of first order pde
98921
Does $y(y+1) \leq (x+1)^2$ imply $y(y-1) \leq x^2$?
102764
Let $f(x)=\int_0^1|t-x|t~dt$ for all real $x$. Sketch the graph of $f(x)$, what is the minimum value of $f(x)$
28088
When is $f_{xy}(x,y)\neq f_{yx}(x,y)?$
141223
$f(x^2) = 2f(x)$ and $f(x)$ continuous
47410
How to plot the contour of f[x,y]==0 if always f[x,y]>=0
31269
How to visualize $f(x) = (-2)^x$
39995
Showing that partial derivatives of $f(x) = \frac{xy}{x^2+y^2}$ exist for $(x,y) \neq (0,0)$
24307
Is $x^x=y$ solvable for $x$?
127449
Uniform continuous of $f(x,y) = \sin(x^2+y)$
39894
Graphing y=x^2 and y=x
17175
Problem in solving functional equation $f(x^2 + yf(x)) = xf(x+y)$
68409
Consider $f(x,y)=\sup_{θ,φ}\{||e^{i θ }x+ e^{i φ }y||^2: θ,φ∈R\}$ in which $x,y\in\mathbb C^n$
409
functions satisfying $f(x - y) = f(x) f(y) - f(a - x) f(a + y)$ and $f(0)=1$
13572
$x^y+y^x>1$ for all $(x, y)\in \mathbb{R_+^2}$