Functional Equation involving derivatives and time-steps
64339
Find $f$ where $f'(x) = f(1+x)$
128751
Solving for $f(2004)$ in a given functional equation
76458
Solve the following functional equation $f(xf(y))+f(yf(x))=2xy$
146318
Derivative of f(x)=arth(lnx)
35025
Solution to the linear SDE $dX_t = \alpha X_t \, dt + \sqrt{2} dB_t$ using Itô calculus
25953
Solving a functional relation $f\left( x \cdot f(y)\right)=x^2 \cdot y^a$
15820
Discontinuous linear functional
30723
Second derivative "formula derivation"
32856
Functional equations $f(x+y)= f(x) + f(y)$ and $f(xy)= f(x)f(y)$
65100
Derivative of the product of operators and Derivative of exponential
116270
Functional equations leading to sine and cosine
135536
Scheme Derivative Function
131586
Hard functional equation: $ f \big ( x y + f ( x ) \big) = f \big( f ( x ) f ( y ) \big) + x $
129600
Equation for a smooth staircase function
95598
Derivative of unit step function?
35281
$1992$ IMO Functional Equation problem
34074
Nonlinear Functional Equation $f(x)^{2}=f\left(\frac x a\right)$