Chinese Acad Sci, Inst High Energy Phys, Beijing 100049, Peoples R China
; Chinese Acad Sci, Inst Theoret Phys, Beijing 100080, Peoples R China
; Tsinghua Univ, Dept Phys, Beijing 100084, Peoples R China
; Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China
Since the special relativity can be viewed as the physics in an inverse Wick rotation of four-dimensional (413) Euclid space, which is at almost equal footing with the 4D Riernann/Lobachevski space, there should be important physics in the inverse Wick rotation of 4D Riemann/Lobachevski space. Thus, there are three kinds of special relativity in de Sitter(dS)/Minkowski/anti-de Sitter(AdS) space at almost equal footing, respectively. There is an instanton tunnelling scenario in the Riemann-de Sitter case that may explain why A be positive and link with the multiverse.