Sommaire

Vertex covering with monochromatic paths.

Erdős, Paul ; Gyárfás, András

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p. 7-10

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A sphere problem in Euclidean space. (Ein Kugelproblem im euklidischen Raum.)

Sachs, Hans

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p. 11-28

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Products of pseudoradial spaces.

Obersnel, Franco ; Tironi, Gino

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p. 29-38

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A space-time theorem in the de Sitter-world. (Ein Raum-Zeit-Satz für die de Sitter-Welt.)

Benz, Walter

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p. 39-43

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A geometric method for the approximation by nearest integer continued fractions. (Eine geometrische Methode bei der Approximation durch Kettenbrüche nach dem nächsten Ganzen.)

Kopetzky, Hans Günther ; Schnitzer, Franz Josef

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p. 45-54

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Infinite number of spheres through four tangents. (Unendlich viele Kugeln durch vier Tangenten.)

Stachel, Hellmuth

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p. 55-66

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On a problem of W. J. Firey in connection with the characterization of spheres.

Leichtweiss, Kurt

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p. 67-75

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On the area sum of a convex polygon and its polar reciprocal.

Florian, August

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p. 77-84

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On Ky Fan's inequality.

Pečarić, Josip E. ; Alzer, Horst

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p. 85-93

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The isotropic 3-sphere.

Vogel, Walter O.

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p. 95-104

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Connections in k-vector bundles.

Tamássy, Lajos ; Kozma, László

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p. 105-114

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On (r,t)-commutativity of n(2)-permutable semigroups.

Babcsányi, I. ; Nagy, A.

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p. 115-120

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Bose's vertex theorem for simply closed polygons.

Wegner, Bernd

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p. 121-132

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3D-Darboux motions in 4-dimensional Euclidean space.

Karger, Adolf

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p. 133-143

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Symplectic Plücker transformations.

Havlicek, Hans

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p. 145-153

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On opposite angle points in isotropic triangle geometrics. (Zu den Winkelgegenpunkten der isotropen Dreiecksgeometrie.)

Tölke, Jürgen

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p. 155-161

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Approximation in Lie transformation groups by superposition of one-parameter subgroups. (Approximation in Lieschen Transformationsgruppen durch Überlagerung von einparametrigen Untergruppen.)

Wallner, Johannes

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p. 163-173

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On geodesic mappings of recurrent Finsler spaces.

Bácsó, Sándor ; Papp, Ildikó

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p. 175-180

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On a generalized stereographic projection. (Zur verallgemeinerten stereographischen Projektion.)

Dietz, Roland ; Geise, Gerhard ; Jüttler, Bert

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p. 181-197

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On certain functions defined in universal algebras. (Sur certaines fonctions définies dans des algèbres universelles.)

Maurer, I.Gy. ; Szilágyi, M.

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p. 199-202

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Plane Bézier curves of third order: Some geometric reflections. (Ebene Bézierkurven 3. Ordnung: Einige geometrische Überlegungen.)

Lang, Johann

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p. 203-216

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Tubular NURB surfaces with boundary control.

Szilvási-Nagy, M.

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p. 217-228

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The satellite kinematics in Bolyai-Lobachevsky geometry in elementary geometrical representation. (Die Satellit-Kinematik in der Bolyai-Lobatschefskyschen Geometrie in elementar-geometrischer Behandlung.)

Vermes, I.

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p. 229-236

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Fermat's theorem in János Bolyai's manuscripts.

Kiss, Elemér

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p. 237-242

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The “octoid” with triple planar symmetry and its point orbits. (Das dreifach plansymmetrische "Oktoid" und seine Punktbahnen.)

Wohlhart, K.

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p. 243-265

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Constrainedly moving polyhedral models. I. (Zwangläufig bewegliche Polyedermodelle. I.)

Röschel, Otto

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p. 267-284

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Cyclides of order 3 in Galileian space G3. (Zykliden 3. Ordnung des galileischen Raumes G3.)

Palman, Dominik

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p. 285-295

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Corrigendum to "Products of pseudoradial spaces".

Obersnel, Franco ; Tironi, Gino

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p. 297-298

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