
doi: 10.3390/math6040052
The main purpose of the present paper is to well define Minkowskian angles and pseudo-angles between the two null directions and between a null direction and any non-null direction, respectively. Moreover, in a kind of way that will be tried to be made clear at the end of the paper, these new sorts of angles and pseudo-angles can similarly to the previously known angles be seen as (combinations of) Minkowskian lengths of arcs on a Minkowskian unit circle together with Minkowskian pseudo-lengths of parts of the straight null lines.
Minkowski plane, Special relativity, trigonometry, Minkowski angles, Minkowskian pseudo-angle, Minkowskian pseudo-angles, Hyperbolic and elliptic geometries (general) and generalizations, Minkowski plane; Minkowskian length; Minkowskian angle; Minkowskian pseudo-angle, Minkowskian length, QA1-939, Minkowskian angle, Classical or axiomatic geometry and physics, two-dimensional Minkowski spacetime, Mathematics
Minkowski plane, Special relativity, trigonometry, Minkowski angles, Minkowskian pseudo-angle, Minkowskian pseudo-angles, Hyperbolic and elliptic geometries (general) and generalizations, Minkowski plane; Minkowskian length; Minkowskian angle; Minkowskian pseudo-angle, Minkowskian length, QA1-939, Minkowskian angle, Classical or axiomatic geometry and physics, two-dimensional Minkowski spacetime, Mathematics
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