Portfolio

Fence Challenge - Défi Carré du Diable

Twelve pentominoes, one for each zodiac sign.  One mission: use the tiles to build a fence, and enclose as much area as possible.

This problem was first posted in 1968 by Fr. V. Feser. This project aims to use gamification techniques and citizen science, to approach this challenge. 

To access the instruccions and printing material go to: https://www.erikaroldan.net/_files/ugd/260316_fad1e3d0aaac4d6eae2f3e5f64bbbbab.pdf

Kudos and high respect to the entire team behind this project:

La complexité des labyrinthes

https://www.eeeeh.ch/la-complexite-des-labyrinthes-2756/

Par Collective Queerality 

De Erika Roldán Roa avec Ana Chavez Caliz,  Manuel Estévez, Eric Roldán, Claudia Silva


Migrar puede significar muchas cosas diferentes para cada persona. Para unas, es un sueño, una puerta para nuevas oportunidades. Para otras, es una necesidad: una decisión impuesta que está fuera su control. Más allá de las razones por las que migramos, cambiar tu país de residencia es una experiencia desorientadora. Navegar un nuevo sistema, con nuevas leyes, costumbres e idiomas, es fascinante, pero también confuso, agotador y complejo: como moverse en un laberinto.  La complexité des laberynthes invita entonces a comparar ambas experiencias: a explicar de manera tangible cómo lidiamos con, por ejemplo, sanar un corazón roto lejos de "casa".


La complexité des labyrinthes forma parte del programa del 2023 del Bureau Des Questions Importantes, que se llevó a acabo del 1 al 16 de Septiembre en Nyon, Suiza.

Commemorating Poincaré Conjecture

https://mathfest.mathi.uni-heidelberg.de/poincare-conjecture/


I helped with some of the drawings on the following website, where the University of Heidelberg is announcing the celebration of the Poincaré conjecture as part of the Millennium Problems MathFest.



Krabbe in Eile?

https://youtu.be/WfOfu4_MP1Q?t=3083


Some surfaces may look different, but they are topologically equivalent. That is, we can smoothly deform one (without pinching or breaking it) into the other. 


What is Differentiable Geometry? Curves and Surfaces

by Anton Petrunin and Sergio Zamora (paper version available at lulu.com)

Two theorems in a puddle

Lagunov's fishbowl

 Castellum Egregium

Alhambra and wallpaper tilings.

One way to study the structure of the objects surrounding us is by looking at their symmetries. To find out more about wallpaper tilings, their symmetry groups, and their presence in the Palace of Alhambra, check out the January blog post of STRUCTURES, by clicking here.

More Math illustrations

Collapse of surfaces