Jean (Hans) Arp, Dream Amphora (Objet de reve a l'anse), 1941 VS Felix Klein, Klein bottle, 1882

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Jean (Hans) Arp, Dream Amphora (Objet de reve a l'anse), 1941 VS Felix Klein, Klein bottle, 1882
Felix Klein – Scientist of the Day
Christian Felix Klein, a German mathematician, died June 22, 1925, at the age of 76.
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To paint in four dimensions, I tessellated squares with octagons. These I drew with a series of rulers that became progressively shorter as they moved around the surface. I made a collection of rulers of different lengths, exchanging them as I went along, and discovered that following a shrinking rule rigorously led to a recalculation of pi.
Tony Robbin, Fourfield
Abdelazz Nait Merzouk
Green is positive; red is negative. ℂ arguments can also be “in-between” (along 2 different paths, here shown as blue & yellow).
Felix Klein’s modular function ℑ: ℂP1 → ℂP1 equals
0 at the centers of the icosahedron's faces,
1 on the midpoints of its edges,
and ∞ at its vertices.
It satisfies all symmetries of the icosahedron:
A₅’s generators are: aaa = bb = [ab]⁵ = leave alone. Enjoy.
— isomorphismes (@isomorphisms) May 17, 2018
Ø, fold, cusp, swallowtail, butterfly
Felix Klein y el Programa de Erlangen: La Revolución en la Geometría Moderna
Stolpersteine beim SV Meppen
Gunter Demnig verlegte in #Meppen fünf weitere Stolpersteine zur Erinnerung an die Opfer der Nationalsozialisten - darunter auch für drei ehemalige Fußballspieler des @svmeppen1912.
Am letzten Freitag hat in Meppen (Ems) der Kölner Künstler Gunter Demnig fünf weitere Stolpersteine verlegt. Demnigs einzigartiges Projekt umfasst inzwischen mehr als 100.000 Stolpersteine. Sie erinnern in 22 Ländern Europas an Menschen, die von den Nationalsozialisten verfolgt, meist deportiert und er mordet wurden. Angeregt durch den örtlichen „Initiativkreis Stolpersteine“ sind bisher in…
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