3-D Hilbert curve -

120-cell -

Hyperboloid of revolution -

Hyperbolic plane -

Klein bottle -

Menger Sponge -

Oloid -

Plücker's conoid -

The Schwarz Lantern -

Sierpinski tetrahedron -

Stanford bunny -

Tangent developable -

Truncated icosahedron -

Villarceau circles -

Various

In geometry, Villarceau circles are a pair of circles produced by cutting a torus obliquely through the center at a special angle (from Wikipedia).

Construction period: May 2016 - July 2016, more details here.

A hyperboloid of revolution of one sheet. The strings are straight lines. For any point on the surface, there are two straight lines lying entirely on the surface which pass through the point. This illustrates the doubly ruled nature of this surface. From Wikipedia

Construction period: Feb. 2015 - March 2015, more details here.

In mathematics, the Menger sponge is a fractal curve. It is a three-dimensional generalization of the Cantor set and Sierpinski carpet. It was first described by Karl Menger in 1926, in his studies of the concept of topological dimension, see Wikipedia.

Instructions from the institute for figuring. Card cube instructions.

Construction period: May 2014 - July 2014. No glue was used! More details here.

2018

The tangent developable of a space curve γ(t) is a developable surface formed by the union of the tangent lines to the curve. From Wikipedia

2013, more information of the discoverer of hyperbolic crochet Daina Taimina on the homepage of the Crochet Coral Reef project.

2018, The Schwarz lantern is a pathological example of the difficulty of approximating a smooth curved surface with a polyhedron. From Wikipedia

A Sierpinski Tetrahedron was built of straws during the
long night of science 2014.

An oloid is a three-dimensional curved geometric object that was discovered by Paul Schatz in 1929. It is the convex hull of a skeletal frame made by placing two linked congruent circles in perpendicular planes, so that the center of each circle lies on the other circle. The distance between the circle centers equals the radius of the circles. One third of each circle's perimeter lies inside the convex hull, so the same shape may be also formed as the convex hull of the two remaining circular arcs each spanning an angle of 4π/3. From Wikipedia

Construction period: autumn 2017.

A Hilbert curve (also known as a Hilbert space-filling curve) is a continuous fractal space-filling curve first described by the German mathematician David Hilbert in 1891, as a variant of the space-filling Peano curves discovered by Giuseppe Peano in 1890. From Wikipedia

In geometry, Plücker’s conoid is a ruled surface named after the German mathematician Julius Plücker. From Wikipedia

In geometry, the 120-cell is the convex regular 4-polytope with Schläfli symbol {5,3,3}.

The boundary of the 120-cell is composed of 120 dodecahedral cells with 4 meeting at each vertex. It can be thought of as the 4-dimensional analog of the regular dodecahedron. Just as a dodecahedron can be built up as a model with 12 pentagons, 3 around each vertex, the dodecaplex can be built up from 120 dodecahedra, with 3 around each edge.
From Wikipedia

Under construction. In geometry, the truncated icosahedron is an Archimedean solid, one of 13 convex isogonal nonprismatic solids whose faces are two or more types of regular polygons. This geometry is associated with footballs typically patterned with white hexagons and black pentagons. From Wikipedia

including a 12-unit stellated octahedron and a 30-unit stellated icosahedron made of Sonobe modules, furthermore, a truncated icosahedron.

No glue was used!

Johannes Kepler Universität Linz, Institut für Angewandte Geometrie, Altenberger Str.69, 4040 Linz