Tglad I think you did not understand the joke

Maybe he put the B there to facilitate this joke!

Is this what you mean ?

Benoit B. Mandelbrot

Additive:

Iteration 1. Benoit Benoit B. Mandelbrot Mandelbrot

Iteration 2. Benoit Benoit Benoit B. Mandelbrot Mandelbrot Mandelbrot

Iteration 3. Benoit Benoit Benoit Benoit B. Mandelbrot Mandelbrot Mandelbrot Mandelbrot

Multiplicative:

Iteration 1. Benoit Benoit B. Mandelbrot Mandelbrot

Iteration 2. Benoit Benoit Benoit Benoit B. Mandelbrot Mandelbrot Mandelbrot Mandelbrot

Iteration 3: Benoit Benoit Benoit Benoit Benoit Benoit Benoit Benoit B. Mandelbrot Mandelbrot Mandelbrot Mandelbrot Mandelbrot Mandelbrot Mandelbrot Mandelbrot

What should we use as the "+ c" ?