Exercise from Evan's PDE, bounding the norm of a function that is zero on a subset, using Poincare inequality?
6270
Poincaré inequality for a subspace of $H^1(\Omega)$
106803
How to see $\cos x \leq \exp(-x^2/2)$ on $x \in [0,\pi/2]$?
69871
How to prove Poincaré-like inequality for the integral over the boundary?
86305
A secant inequality for convex functions
106373
Hölder's inequality with three functions
32070
Prove that the Interior of the Boundary is Empty
76147
Bounding holomorphic function at 0 given other bounds
143869
Showing that the norm of the canonical projection $X\to X/M$ is $1$
106075
Shading a region where an inequality is satisfied
2129
Showing that the derivative operator is not bounded on $L^2 (\mathbb{R})$
30330
How can I prove that this function is bounded using the given 2 hints?
38761
Is the $ L^{p}$$[0,1]$ norm continuous in p?
60685
The vector space formed on C[0,1] and the norm $(\int_{0}^{1}|f(t)|^2 dt)^{1/2} $
28619
Bound on integral implies bound on function
107727
$m\{x\in [0,1]:f'(x)=0\}>0$
157624
How to force the function to take positive value when solving PDE by NDSolve
61710
Proof of Cauchy-Schwarz inequality - Why select s so that so that $||x-sy||$ would be minimized?