Revision history [back]

I have the following equation:

U=(8pihf^3)/(c^3)/(exp((hf)/(k*T))-1),

and I would like to solve it's derivative with respect to f equal to zero for f. I know this equation can be explicitly solved for f with the LambertW function, however sage only provides an implicit solution, or if I specify it must be explicit, it only gives the trivial solution. Is there any way to get it to use the LambertW function when using solve?

I have the following equation:

U=(8*pi*h*f^3)/(c^3)/(exp((h*f)/(k*T))-1),

and I would like to solve it's derivative with respect to f equal to zero for f. I know this equation can be explicitly solved for f with the LambertW function, however sage only provides an implicit solution, or if I specify it must be explicit, it only gives the trivial solution. Is there any way to get it to use the LambertW function when using solve?