Archives
- August 2022
- June 2022
- May 2022
- April 2022
- January 2022
- August 2021
- July 2021
- June 2021
- December 2020
- October 2020
- August 2020
- December 2019
- November 2019
- September 2019
- August 2019
- July 2019
- August 2018
- May 2018
- March 2017
- December 2014
- November 2014
- October 2014
- September 2014
- July 2014
- June 2014
- May 2014
- November 2013
- October 2012
- May 2012
Categories
- Algebraic Topology
- Baer-Specker group
- Cardinality
- Categorical Topology
- Category Theory
- Cech expansion
- compact-open topology
- Conferences
- coreflection functor
- Covering Space Theory
- Dendrite
- earring group
- earring space
- Finite groups
- Free abelian groups
- Free groups
- Fundamental group
- Fundamental groupoid
- General topology
- Generalized covering space theory
- Griffiths twin cone
- Group homomorphisms
- Group theory
- harmonic archipelago
- Higher Homotopy groups
- homotopically Hausdorff
- Homotopy theory
- Infinite Group Theory
- Infinite products
- Inverse Limit
- locally path connected
- one-dimensional spaces
- Order Theory
- Peano continuum
- Quasitopological groups
- quotient topology
- reduced paths
- semicovering
- Shape homotopy group
- Shape theory
- Simplicial complexes
- Singular homology
- topological fundamental group
- Topological groups
- Tree
- Ultrafilter
- Uncategorized
Tweets
- Today we talked about the "monoid" of words in the latin alphabet + space. They were fascinated that this could be… twitter.com/i/web/status/1… 2 weeks ago
- RT @MarissaKawehi: Reminder that we are collecting signatures until we send this letter to the AMS Notices on September 30th! Mathematician… 2 weeks ago
- Why aren't free groups taught as standard examples in many undergrad algebra classes? I feel like in most books i… twitter.com/i/web/status/1… 3 weeks ago
-
This work is licensed under a Creative Commons Attribution 4.0 International License.
Tag Archives: earring space
The Harmonic Archipelago
Another fascinating space that receives a lot of attention is the so-called harmonic archipelago which is the following subspace of . You can describe the construction like this: Start by drawing the usual earring space onto a solid disk in … Continue reading
The fundamental group of the earring space
Here is one of my favorite spaces: The earring space, i.e. the “shrinking wedge of circles.” This space is the first step into the world of “wild” topological spaces. This post is meant to be an introduction into how one … Continue reading
Wild Topology 