Good online references for solving functional equations?
67594
Books on functional equations
49794
Solve $f(x^2+y+f(y))=2y+f(x)^2$ over $\mathbb{R}$
133646
real analysis -functional equation
132093
Solve $f(f(x))=f(x)$
48925
BMO1 2009/10 Q5 functional equation: $f(x)f(y) = f(x + y) + xy$
6506
Reference help for "fuzzy mathematics"
103934
Functional Equation (no. of solutions): $f(x+y) + f(x-y) = 2f(x) + 2f(y)$
144557
Linearly independent functionals
157744
Cauchy's functional equation with composite function: $gf(x+y)=gf(x)+gf(y)$
4178
Solve $f(x)f(2x^2) = f(2x^3+x)$
101852
Differential equations that are also functional
147195
Help needed in finding the value of $f(2001)$ in the given functional equation
153942
Solution of functional equation $f(x+y)=f(x)+f(y)+y\sqrt{f(x)}$
62111
Functional Equation $f(mn)=f(m)f(n)$.
117254
Solving a implicit, recursive function
109706
Fast way to come up with solutions to $x(x-1)(x-2)(x-3)=1$?
25953
Solving a functional relation $f\left( x \cdot f(y)\right)=x^2 \cdot y^a$