In $E=hf$, can $f$ assume any positive value? (Beginner)
22738
Is the electromagnetic spectrum discrete?
64571
Prove that $\int_{E}f =\lim \int_{E}f_{n}$
82448
Why is $f(x) = x\phi(x)$ one-to-one?
99827
For what values will f(x) be necessarily one-one?
152686
How to derive $E=mc^{2}$?
26677
thoughts about $f(f(x))=e^x$
127125
Can the limit $\lim_{h \to 0}\frac{f(x + h) - 2f(x) + f(x - h)}{h^2}$ exist if $f'(x)$ does not exist at $x$?
80210
It is posible to have a function $f$ with the following property?
86623
Why is $B^TB+\lambda\Omega$ positive definite?
128875
Expectation values of the position operator is equal to zero in case of even potentials?
50089
characterization of the existence of higher order expectation.
137982
Show that $\textbf{ZF}$ shows $\phi$ is $\Delta_1$
96539
is $f$ constant or dilation
73807
Prove positive definiteness
76790
Condition to guarantee $f=0$ on $[a,b]$
88790
Positive harmonic function on $\mathbb{R}^n$ is a constant?
776
Entire function with positive real part is constant (no Picard)