Classifies A-singularities of parallel projections of surfaces in R^4, proves counts of special tangent directions at elliptic/hyperbolic/parabolic points, establishes a Koenderink-type theorem for apparent contours, and connects projection singularities to contour features.
Title resolution pending
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
fields
math.DG 1years
2026 1verdicts
UNVERDICTED 1representative citing papers
citing papers explorer
-
On the contact of surfaces in $4$-space with 2-planes and their apparent contours
Classifies A-singularities of parallel projections of surfaces in R^4, proves counts of special tangent directions at elliptic/hyperbolic/parabolic points, establishes a Koenderink-type theorem for apparent contours, and connects projection singularities to contour features.