Amirkabir University of Technology AUT Journal of Mathematics and Computing 2783-2449 7 4 2026 10 01 Waldschmidt constant of some classes of hypergraphs 391 397 5563 10.22060/ajmc.2024.23561.1266 EN Iman Jahani Department of Mathematics and Computer Science, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran Shamila Bayati Department of Mathematics and Computer Science, Amirkabir University of Technology (Tehran Polytechnic), Tehran, Iran Journal Article 2024 09 30 In this paper, we present a formula for the Waldschmidt constant of edge ideals of some classes of hypergraphs. We also show that if $G$ is a simple graph with binomial edge ideal $J_G$, then the Waldschmidt constant of $J_G$ is always 2. Furthermore, the symbolic defect of umbrella hypergraphs is presented. https://ajmc.aut.ac.ir/article_5563_d02e9bdc27a894e882fa0c9055c99722.pdf