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All Journal Electronic Journal of Graph Theory and Applications (EJGTA) Bulletin of Electrical Engineering and Informatics Journal of the Indonesian Mathematical Society Jurnal Matematika & Sains Journal of Mathematical and Fundamental Sciences Indonesian Journal of Combinatorics
Edy Tri Baskoro
Institut Teknologi Bandung
Astronomy Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Mathematics Physics

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Computation of the eigenvalues of complete signed graphs Shariefuddin Pirzada; Mir Riyaz Ul Rashid; Amir Rehman; Edy Tri Baskoro
Electronic Journal of Graph Theory and Applications (EJGTA) Vol 14, No 1 (2026): Electronic Journal of Graph Theory and Applications
Publisher : GTA Research Group, Univ. Newcastle, Indonesian Combinatorics Society and ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/ejgta.2026.14.1.16

Abstract

A signed graph Σ is the ordered pair (G,σ), where G=(V,E) is a finite simple graph, called the underlying graph, and σ: E(G) → {+1, -1} is a sign function or a signature of Σ. Let (K_n,σ) be a complete signed graph with n vertices. In this paper, we give a complete description of the adjacency, Laplacian and net Laplacian spectrum of a complete signed graph (K_n,σ) whenever its negative edges induce either a complete tripartite graph or a friendship graph. This is an addition to the class of complete signed graphs whose spectra is completely known.
Co-Authors A Asmiati Ahmad Erfanian Amir Rehman Anisa Rarasati Arfin Arfin Bana Kartasasmita Bana Kartasasmita Brilly Maxel Salindeho BUDI RAHADJENG Chula Janak Jayawardene Debi Oktia Haryeni Debi Oktia Haryeni Debi Oktia Haryeni Denny Riama Silaban Denny Riama Silaban Dian Kastika Syofyan Dian Kastika Syofyan Didi Rosiyadi Dinny Fitriani Djoko Suprijanto Enik Noviani Erfanian, Ahmad Faisal Susanto Gholamreza Abrishami Gregory Benedict Tanidi Hilal A Ganie Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun Hilda Assiyatun, Hilda I Made Arnawa I Made Arnawa I Wayan Palton Anuwiksa Iwan Setiawan Josef Siran Korivand, Meysam Kristiana Wijaya Lilanthi Samarasekara Lusiani, Anie Maulidyani Abu Meysam Korivand Mir Riyaz Ul Rashid Mirka Miller Mojdeh, Doost Ali Mostafa Tavakoli Muhammad Kamran Siddiqui Muhammad Ridwan Muhammad Salman Alfarisi Nawawi Mushtaq Shah N. Nurdin Nabila, Maya Nobuaki Obata Nurdin Nurdin Ratih Suryaningsih Rika Yanti Rina Ratianingsih Rinovia Simanjuntak Rinovia Simanjuntak Rinovia Simanjuntak Rinovia Simanjuntak Rinovia Simanjuntak Saladin Uttunggadewa Saladin Uttunggadewa Saladin Uttunggadewa Salindeho, Brilly Maxel Shariefuddin Pirzada Shariefuddin Pirzada Suhadi Wido Saputro Suhadi Wido Saputro Suhadi Wido Saputro Suhadi Wido Saputro Suhadi Wido Saputro Suhadi Wido Saputro Susilawati, S. Syafrizal Sy Utari sumarno Utari sumarno