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On singular solitons of the KP equation and the Go-diagrams

  • Shilong Huang
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Abstract

It has been proven that real and regular soliton solutions of the KP equation are classified in terms of the totally nonnegative Grassmannian. It is well known that vertex operators can be used to construct soliton solutions. In this paper, we consider several regular soliton solutions and study their combinations through products of vertex operators. In general, the resulting solutions become singular. Totally nonnegative elements are parametrized by the Le-diagrams introduced by Postnikov. We show that the resulting singular solutions can be parametrized by Go-diagrams, which extend Le-diagrams and arise in the Deodhar decomposition of the Grassmannian.

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Cite

BibTeXRIS
BibTeX
@misc{huang2026singular,
  title = {{On singular solitons of the KP equation and the Go-diagrams}},
  author = {Shilong Huang},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2606.04663},
  eprint = {2606.04663},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.04663},
}
RIS
TY  - UNPB
TI  - On singular solitons of the KP equation and the Go-diagrams
AU  - Shilong Huang
PY  - 2026
DA  - 2026/09/23
PB  - arXiv
DO  - 10.48550/arxiv.2606.04663
UR  - https://arxiv.org/abs/2606.04663
AB  - It has been proven that real and regular soliton solutions of the KP equation are classified in terms of the totally nonnegative Grassmannian. It is well known that vertex operators can be used to construct soliton solutions. In this paper, we consider several regular soliton solutions and study their combinations through products of vertex operators. In general, the resulting solutions become singular. Totally nonnegative elements are parametrized by the Le-diagrams introduced by Postnikov. We show that the resulting singular solutions can be parametrized by Go-diagrams, which extend Le-diagrams and arise in the Deodhar decomposition of the Grassmannian.
ER  -