Lower bounds for the constants in the real multipolynomial Bohnenblust–Hille inequality

On the real multipolynomial Bohnenblust-Hille inequality

“…The following result proved in [6] provides proper lower bounds for C M and, in extreme cases, recovers the estimates (2.2) and (2.3).…”

“…In [6], we adapt the techniques due to [1] and [3] aiming to yield nontrivial lower bounds for C M in (2.1). To do so, we let f and g denote the real-valued functions defined by means of the equations…”