Journal for Geometry and Graphics

Volume 25 (2021)

  Number 1Number 2 

Number 1

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B. Odehnal
Isoptic Ruled Surfaces of Developable Surfaces
1--17 [Abstract / Full Text]

J. Siegele, M. Pfurner, H.-P. Schröcker
Space Kinematics and Projective Differential Geometry Over the Ring of Dual Numbers
19--31 [Abstract / Full Text]

A. Szilárd
Similar Trapezoids on the Sides of a Triangle
33--44 [Abstract / Full Text]

H. Al-Zoubi, T. Hamadneh, M. Abu Hammad, M. Al-Sabbagh
Tubular Surfaces of Finite Type Gauss Map
45--52 [Abstract / Full Text]

Ch. van Tienhoven, D. Pellegrinetti
Quadrigon Geometry: Circumscribed Squares and Van Aubel Points
53--59 [Abstract / Full Text]

T. Q. Hung, N. T. T. Duong
Generalizations of Fagnano's Problem
61--69 [Abstract / Full Text]

T. H. S. Li
On Pepe Trapezoids
71--78 [Abstract / Full Text]

F. Giudiceandrea, L. Grasselli
From M. C. Escher's Hexagonal Tiling to the Kiepert Hyperbola
79--95 [Abstract / Full Text]

H. Stachel
Isometric Billiards in Ellipses and Focal Billiards in Ellipsoids
97--118 [Abstract / Full Text]

M. Dalcín, S. N. Kiss
Some Properties of the García Reflection Triangles
119--126 [Abstract / Full Text]

G. Weiß, P. Pech
A Quadratic Mapping Related to Frégier's Theorem and Some Generalisations
127--137 [Abstract / Full Text]

N. Sato
An Analysis of Vermeer's Perspective in Composition
139--154 [Abstract / Full Text]

Number 2

back to  Number 1

S. Pylypaka, T. Kresan, O. Trokhaniak, I. Taras, I. Demchuk
Parametric Equations of a Spatial Curve as a Function of Length of the Arc with Given Dependences of Curvature and Angle of Ascent
163--170 [Abstract / Full Text]

J. Wittenburg
Polyhedral Cylinders Formed by Kokotsakis Meshes
171--186 [Abstract / Full Text]

N. Phat Nguyen
Projective Line Revisited
187--195 [Abstract / Full Text]

H. Katsuura
Dihedral Angles of 4-Ball Tetrahedra
197--204 [Abstract / Full Text]

R. Alves Garcia, B. Odehnal, D. Reznik
Poncelet Porisms in Hyperbolic Pencils of Circles
205--225 [Abstract / Full Text]

M. Lassak
A Note on Some Generalizations of Monge's Theorem
227--230 [Abstract / Full Text]

G. Vincenzi
On a Proof of the Thabit Ibn Qurra's Generalization of the Pythagorean Theorem
231--241 [Abstract / Full Text]

H. Katsuura
Angles of Isosceles Tetrahedra
243--251 [Abstract / Full Text]

T. Q. Hung
Extending a Theorem of van Aubel to the Simplex
253--263 [Abstract / Full Text]

T. V. Phan, A. Doan
A Curious Use of Extra Dimension in Classical Mechanics: Geometrization of Potential
265--270 [Abstract / Full Text]

G. Maresch, S. A. Sorby
Perspectives on Spatial Thinking
271--293 [Abstract / Full Text]

G. Asti, L. Asti
Pentagon from Side Using the Internal Golden Section
295--300 [Abstract / Full Text]