Epimorphism from the Drinfeld Yangian of the queer Lie superalgebra

Let $Y_N(q_n)$ and $Y_D(sq_n)$ be the Yangians in the Drinfeld and RTT-type presentations, respectively, with generators $x^{7}_{i,0}(u)$, $x^{7}_{i,1}(u)$, $h_{i,0}(u)$, $h_{i,1}(u)$, and $d_{i,j}(u)$ as in the paper. Let $I$ denote the index set used there. The map is defined by

$$\Phi:Y_N(q_n)\longrightarrow Y_D(sq_n).$$

The epimorphism conjecture. The map defined by

$$\begin{aligned} x^{+}_{i,0}(u)&=\Phi(x^-_{i+1,i}(u)), & i&\in I,\\ x^-_{i,0}(u)&=\Phi(x^+_{i,-i-1}(u)), & i&\in I,\\ x^{+}_{i,1}(u)&=\Phi(x^-_{i+1,-i}(u)), & i&\in I,\\ x^{-}_{i,1}(u)&=\Phi(x^+_{i,i+1}(u)), & i&\in I,\\ h_{i,0}(u)&=\Phi(d^+_{i,i}(u)), & i&\in I,\\ h_{i,1}(u)&=\Phi\bigl((d_{i,-i}(u))^{-1}\bigr)\Phi(d_{i+1,-i-1}(u)), & i&\in I \end{aligned}$$

is an epimorphism. The claim concerns the identification of the Drinfeld presentation with the RTT presentation through the displayed assignment; the source does not establish its status beyond stating the assertion.