Equivalent definitions of dyadic Muckenhoupt and Reverse H\"older classes in terms of Carleson sequences, weak classes, and comparability of dyadic $L\log L$ and $A_{\mathrm{\infty }}$ constants

In the dyadic case the union of the Reverse H"{o}lder classes, $R{H}_p^d$ is strictly larger than the union of the Muckenhoupt classes $A_p^d$. We introduce the $R{H}_1^d$ condition as a limiting case of the $R{H}_p^d$ inequalities as $p$ tends to 1 and show the sharp bound on $R{H}_1^d$ constant of the weight $w$ in terms of its $A_{\mathrm{\infty }}^d$ constant. We also take a look at the summation conditions of the Buckley type for the dyadic Reverse H"{o}lder and Muckenhoupt weights and deduce them from an intrinsic lemma which gives a summation representation of the bumped average of a weight. Our lemmata also allow us to obtain summation conditions for continuous Reverse H"{o}lder and Muckenhoupt classes of weights and both continuous and dyadic weak Reverse H"{o}lder classes. In particular, it shows that a weight belongs to the class $R{H}_1$ if and only if it satisfies Buckley’s inequality. We also show that the constant in each summation inequality of Buckley’s type is comparable to the corresponding Muckenhoupt or Reverse H"{o}lder constant.