4.33.3 Can you answer these questions?

4.33.3.1 NetTrain with External GPU?

https://mathematica.stackexchange.com/questions/154380/nettrain-with-external-gpu

 
I'd like to use the new Neural Networks functionalities in v11 on my Macbook Pro, unfortunately, most macs do not have the supported Nvidia cards. However, there is the option for using an external  ...
 

- asked by M.R. 3votes

4.33.3.2 Solution (numerical or symbolic) of functional equations?

https://mathematica.stackexchange.com/questions/154515/solution-numerical-or-symbolic-of-functional-equations

 
Can I solve functional equations with Mathematica? How? 
 
For example, I am trying to solve: 
 
$$\frac{F(x)}{F(1)} = 2F\left(\frac{(1+x)^2}{4a}\right)-F(x/a)$$ 
 
for specific values of $a$. Can  ...
 

- asked by becko 1vote

4.33.3.3 Amplitude of a transfer function

https://mathematica.stackexchange.com/questions/154489/amplitude-of-a-transfer-function

 
I'm looking to calculate the amplitude of a transfer function which is defined in a symbolic way : 
 
T=(1 + 2 I r )/(1 - r^2 + 2 I r ) 
 
 
I try this, i doesn't work 
 
Assuming[{ > 0, r > 0},  ...
 

- asked by Bendesarts 1vote

—