The authors acknowledge Dr. G. A. Askarjan for drawing attention to prior work on beam trapping in the Soviet Union, specifically referencing Askarjan's article and Talanof's work on slab-shaped beams in plasmas. They clarify that their conclusion about the focal point developing into a line in a nonlinear material is incorrect, as pointed out by Professor L. W. Anderson, but this does not affect the validity of their solution for trapping a cylindrical beam. The references provided are to Askarjan's and Talanof's respective works. In the second part, the authors address a correction to their earlier work on parity experiments in multiparticle reactions. They suggest inserting a specific sentence after Eq. (4) to clarify the treatment of scalar products that do not change sign, involving a pseudoscalar term.The authors acknowledge Dr. G. A. Askarjan for drawing attention to prior work on beam trapping in the Soviet Union, specifically referencing Askarjan's article and Talanof's work on slab-shaped beams in plasmas. They clarify that their conclusion about the focal point developing into a line in a nonlinear material is incorrect, as pointed out by Professor L. W. Anderson, but this does not affect the validity of their solution for trapping a cylindrical beam. The references provided are to Askarjan's and Talanof's respective works. In the second part, the authors address a correction to their earlier work on parity experiments in multiparticle reactions. They suggest inserting a specific sentence after Eq. (4) to clarify the treatment of scalar products that do not change sign, involving a pseudoscalar term.