Kling, Gerhard2023-05-232023-05-232023-04-30Kling, G 2023, 'On the uniqueness of the Laplacian spectra of coalescence of complete graphs', Open Journal of Discrete Applied Mathematics, vol. 6, no. 1, pp. 25-39. https://doi.org/10.30538/psrp-odam2023.00822617-9687ORCID: /0000-0002-3029-7269/work/135638207https://hdl.handle.net/2164/20761Acknowledgments: I would like to thank Nicole Snashall for her encouragement, comments and support. I also would like to thank Jozef Siran for his comments on amalgamations, which led to more thinking about defining my graphs. This project started with an application to social networks; however, it developed into a much more general study. I would like to dedicate this paper to the memory of Alto Zeitler (1945-2022), my mathematics teacher.15574393engSubstantive connection via eligible employment contractCoalescenceLaplacian spectrumBlock graphsHG FinanceHGJournal article10.30538/psrp-odam2023.008261