Title The spectral radius of signless Laplacian matrix and sum-connectivity index of graphs Type of Research Article Keywords The spectral radius of signless Laplacian matrix and sum-connectivity index of graphs Abstract The spectral radius of signless Laplacian matrix and sum-connectivity index of graphs Researchers Akbar Jahanbani (First Researcher)، Seyed Mahmoud Sheikholeslami Kavkani (Second Researcher)