Roughly, the belt of the earth's horizon contains the loci of all human perspective planes.
"Harvard Psychological Studies, Volume 1" by Various
A Treatise upon the Principles and Practice of Plane and Cylindrical Perspective.
"The Olden Time Series, Vol. 3: New-England Sunday" by Henry M. Brooks
A Treatise upon the Principles and Practice of Plane and Cylindrical Perspective.
"The Olden Time Series, Vol. 1: Curiosities of the Old Lottery" by Henry M. Brooks
Horizontals in the same plane which are drawn to the same point on the horizon are perspectively parallel to each other.
"The Theory and Practice of Perspective" by George Adolphus Storey
A Treatise upon the Principles and Practice of Plane and Cylindrical Perspective.
"Ticknor and Company Book Catalog (1887)" by Ticknor and Company
Two projective rows are perspective if they lie in the same plane, and if the one row is a projection of the other.
"Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 6" by Various
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Side cut view (top) and Cut view in perspective (bottom) of the RICH counter showing the radiator plane at the top separated from the photodetector plane by the (photon) drift space (ring expansion gap).
The RICH counter of the AMS experiment
However, we know now that this this idea came from the limited perspective of spacecraft that remained in or near the ecliptic plane; it gradually became apparent that the fast wind is indeed the more “ambient” steady state (e.g., Feldman et al. 1976; Axford 1977).
Coronal Heating versus Solar Wind Acceleration
The paper also deals with the problem of maintaining connectivity of mobile vertices communicating by radio, but from an orthogonal perspective to the one in the present paper - it describes a kinetic data structure to maintain the connected components of the union of unit-radius disks moving in the plane.
Dynamic Random Geometric Graphs
From a graph drawing perspective ( see for a survey of graph drawing), the traditional questions ask whether a graph can be embedded in the plane such that some criterion is satisﬁed, e.g. that the area of the resulting embedding, the number of edge crossings or the number of edge bends is minimized.
Complexity of Planar Embeddability of Trees inside Simple Polygons
From the ﬁve dimensional perspective one can now perform a complex Lorentz boost in the (t, x5 ) plane mapping (t, x5 ) to (ix5 , it).
Euclidean SYM Theories by Time Reduction and Special Holonomy Manifolds
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