On Some Classical and Weighted Estimates for SL4
The purpose of this paper is two-sided. First, we obtain the correct estimate of the error term in the classical prime geodesic theorem for compact symmetric space SL4. As it turns out, the corrected error term depends on the degree of a certain polynomial appearing in the functional equation of the attached zeta function. This is in line with the known result in the case of compact Riemann surface, or more generally, with the corresponding result in the case of compact locally symmetric spaces of real rank one. Second, we derive a weighted form of the theorem. In particular, we prove that the aforementioned error term can be significantly improved when the classicalapproachisreplacedbyitshigherlevelanalogue. Key–Words: Symmetric spaces, counting functions, length spectrum, zeta functions, Riemann zeta Received: August7, 2019. Revised: February 10, 2020. Accepted: February 21, 2020. Published: March 9, 2020.