Theorem of Lagrange multipliers - Extremas of $f$
114844
Global maxima/minima of $f(x,y,z) = x+y+z$ in $A$
65827
When $\min_{x \in X,y \in Y} f(x,y) = \min_{x \in X} \min_{y \in Y} f(x,y)$?
39451
Proving inequation with maximum and 2nd derivative
104848
What's the name of this theorem ($f>g$ given $f'>g'$ and initial value)?
66742
Proving the AM-GM Inequality with Lagrange Multipliers
98363
Expanding two-variable function $f(x,y)$ over the complete sets $\{ g_{i}(x) \}$ and $\{ h_{j}(y) \}$
63526
Proving that $(\sup_{x\in R}|f'(x)|)^2\leq 4\sup_{x\in R}|f(x)|\cdot\sup_{x\in R}|f''(x)|$.
17406
Determine all the extrema of a function subject to a non-linear constraint.
9748
Maximum modulus principle for an unbounded function in the half right plane
48679
measurability of supremum of a class of functions
24966
Converse of Lagrange's theorem for abelian groups
75653
Prove that $|f ''|\ge 4$
62958
Maximize $\mathrm{tr}(Q^TCQ)$ subject to $Q^TQ=I$
98255
Find $f(x)$ such that $f(f(x)) = x^2 - 2$
111475
Uniform convergence and the supremum theorem
4498
Proof that $\|fx\| \leq \|f\|\cdot\|x\|$
44607
Prove that a continuous function on a closed interval attains a maximum