On the Positive and Negative $p$-Energies of Graphs under Edge Addition

In this paper, we introduce the concepts of positive and negative $p$-energies of graphs and investigate their behavior under edge addition. Specifically, we generalize the classical notions of positive and negative square energies to the $p$-energy setting, denoted by ${\mathcal{E}}_p^{+}(G)$ and ${\mathcal{E}}_p^{-}(G)$, respectively. We establish improved lower bounds for these quantities under edge addition, which sharpen existing results by Abiad et al.\ in the case $p=2$. Furthermore, we address the monotonicity problem for ${\mathcal{E}}_p^{+}(G)$ under edge addition, and construct a family of counterexamples showing that monotonicity fails for $1\le p<3$. Finally, we conclude with several open problems for further investigation.